A fouling control method, device and controller for a seawater recirculating cooling system

Abstract

The present disclosure relates to the technical field of cooling water application, and provides a fouling control method, device and controller applied to a seawater circulating cooling system. The method comprises the following steps: obtaining a chloride ion concentration ratio and an alkalinity concentration ratio of the seawater circulating cooling system; obtaining a concentration ratio difference according to the chloride ion concentration ratio and the alkalinity concentration ratio; and controlling the opening and closing states of a water supplement valve and a water discharge valve of the seawater circulating cooling system according to the concentration ratio difference, so as to control water supplement and water discharge of the seawater circulating cooling system and thus control fouling. In this way, the concentration ratio difference obtained according to the chloride ion concentration ratio and the alkalinity concentration ratio of the seawater circulating cooling system is used to control the opening and closing states of the water supplement valve and the water discharge valve of the seawater circulating cooling system, so as to control water supplement and water discharge of the seawater circulating cooling system, change the concentration ratio in the seawater circulating cooling system, reduce concentration ratio fluctuation, and reduce fouling.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of cooling water application, in particular to a fouling control method, device and controller applied to a seawater circulating cooling system. BACKGROUND

[0002] The seawater circulating cooling water system is a water supply system that circulates and operates with seawater as a cooling medium, which is composed of heat exchange equipment, a seawater cooling tower, a water pump, a pipeline and other related equipment.

[0003] With the popularization of the seawater circulating cooling system, its existing problems are gradually exposed, such as fouling. In the related art, the fouling problem affects the normal operation of the seawater circulating cooling system. SUMMARY

[0004] The purpose of the present disclosure is to provide a fouling control method, device and controller applied to a seawater circulating cooling system to solve the problems in the related art.

[0005] In order to achieve the above purpose, the present disclosure provides a fouling control method applied to a seawater circulating cooling system, comprising:

[0006] obtaining a chloride ion concentration ratio and an alkalinity concentration ratio of the seawater circulating cooling system;

[0007] According to the chloride ion concentration ratio and the alkalinity concentration ratio, a concentration ratio difference is obtained;

[0008] According to the concentration ratio difference, the opening and closing states of the water replenishment valve and the water discharge valve of the seawater circulating cooling system are controlled to control the water replenishment and water discharge of the seawater circulating cooling system, so as to control the fouling condition.

[0009] Optionally, the alkalinity concentration ratio of the seawater circulating cooling system is obtained, comprising:

[0010] obtaining a first alkalinity concentration of a water replenishment port of the seawater circulating cooling system;

[0011] obtaining a second alkalinity concentration of a circulating water pump of the seawater circulating cooling system;

[0012] According to the first alkalinity concentration and the second alkalinity concentration, an alkalinity concentration ratio is obtained.

[0013] Optionally, the calculation formula of the alkalinity concentration ratio is:

[0014] K1=C2 / C1;

[0015] Wherein, K1 is the alkalinity concentration ratio, C2 is the second alkalinity concentration, and C1 is the first alkalinity concentration.

[0016] Optionally, the chloride concentration ratio of the seawater circulating cooling system is obtained, comprising:

[0017] A first conductivity in a cooling tower basin of the seawater circulating cooling system is obtained.

[0018] A second conductivity of a condenser inlet of the seawater circulating cooling system is obtained.

[0019] A third conductivity of a condenser outlet of the seawater circulating cooling system is obtained.

[0020] An average conductivity is obtained according to the first conductivity, the second conductivity and the third conductivity.

[0021] According to the average conductivity, and a preset correspondence between conductivities and chloride concentration ratios, a chloride concentration ratio corresponding to the average conductivity is obtained.

[0022] Optionally, the calculation formula of the concentration ratio difference is:

[0023] △A = K2 - K1;

[0024] Wherein, △A is the concentration ratio difference, K2 is the chloride concentration ratio, and K1 is the alkalinity concentration ratio.

[0025] Optionally, the control of the opening and closing states of the water replenishing valve and the water discharging valve of the seawater circulating cooling system according to the concentration ratio difference comprises:

[0026] The concentration ratio difference is compared with a preset difference threshold value to obtain a first comparison result.

[0027] When the concentration ratio difference is greater than the preset difference threshold value, the water replenishing valve and the water discharging valve of the seawater circulating cooling system are controlled to be opened.

[0028] When the concentration ratio difference is less than or equal to the preset difference threshold value, the opening degree of the water replenishing valve and the water discharging valve of the seawater circulating cooling system is adjusted according to the chloride concentration ratio.

[0029] Optionally, the adjustment of the opening degree of the water replenishing valve and the water discharging valve of the seawater circulating cooling system according to the chloride concentration ratio comprises:

[0030] The chloride concentration ratio is compared with a preset range to obtain a second comparison result.

[0031] When the chloride concentration ratio is in the preset range, the opening degree of the water replenishing valve and the water discharging valve is reduced.

[0032] When the chloride concentration ratio is not in the preset range, the opening degree of the water replenishing valve and the water discharging valve is increased.

[0033] Optionally, the method further comprises:

[0034] When the concentration ratio difference is greater than the preset difference threshold, the chloride ion concentration ratio of the seawater circulating cooling system is taken as the controlled quantity, and a difference between the obtained chloride ion concentration ratio and an input chloride ion concentration ratio set value is taken as an error, and proportional-integral-derivative adjustment is performed on the chloride ion concentration ratio of the seawater circulating cooling system.

[0035] According to a second aspect of the embodiments of the present disclosure, a fouling control device applied to a seawater circulating cooling system is further provided, and the device comprises:

[0036] a concentration ratio obtaining module, configured to obtain a chloride ion concentration ratio and an alkalinity concentration ratio of the seawater circulating cooling system;

[0037] a ratio difference obtaining module, configured to obtain a concentration ratio difference according to the chloride ion concentration ratio and the alkalinity concentration ratio;

[0038] a valve control module, configured to control opening and closing states of a water replenishing valve and a water discharging valve of the seawater circulating cooling system according to the concentration ratio difference, so as to control water replenishing and water discharging of the seawater circulating cooling system, thereby controlling a fouling condition.

[0039] According to a third aspect of the embodiments of the present disclosure, a controller is provided, comprising:

[0040] a memory, on which a computer program is stored;

[0041] a processor, configured to execute the computer program in the memory, and the program, when executed by the processor, implements steps of the fouling control method applied to the seawater circulating cooling system according to the first aspect of the present disclosure.

[0042] Through the above technical solution, the concentration ratio difference obtained according to the chloride ion concentration ratio and the alkalinity concentration ratio of the seawater circulating cooling system is used to control the opening and closing states of the water replenishing valve and the water discharging valve of the seawater circulating cooling system, so as to control water replenishing and water discharging of the seawater circulating cooling system, thereby changing the concentration ratio in the seawater circulating cooling system, reducing concentration ratio fluctuation, and reducing fouling.

[0043] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation of the present disclosure. In the drawings:

[0045] Figure 1 is a block diagram of a seawater circulating cooling system according to an exemplary embodiment;

[0046] Figure 2 is a flow chart of a fouling control method applied to a seawater circulating cooling system according to an exemplary embodiment;

[0047] Figure 3 is a flow chart of a sub-step of step S1 in Figure 2

[0048] Figure 4 is a flow chart of another sub-step of step S1 in Figure 2

[0049] Figure 5 is a flow chart of a sub-step of step S3 in Figure 2

[0050] Figure 6 is a flow chart of a sub-step of step S33 in Figure 5

[0051] Figure 7 is a block diagram of a fouling control device applied to a seawater circulating cooling system according to an exemplary embodiment.

[0052] BEST MODE FOR CARRYING OUT THE INVENTION

[0053] 110 - make-up valve; 120 - drain valve; 130 - cooling tower basin; 140 - circulating water pump; 150 - condenser; 160 - seawater cooling tower; 211 - first conductivity meter; 212 - second conductivity meter; 213 - third conductivity meter; 221 - first alkalinity online analyzer; 222 - second alkalinity online analyzer; 300 - fouling control device applied to a seawater circulating cooling system; 301 - concentration ratio obtaining module; 302 - ratio difference obtaining module; 303 - valve control module. DETAILED DESCRIPTION

[0054] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0055] In the following description, the words "first", "second", and the like, are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance, nor indicating or implying sequence.

[0056] As shown in FIG. 1, the seawater circulating cooling system according to the present disclosure includes a condenser 150, a circulating water pump 140, a cooling tower basin 130, a make-up valve 110, a drain valve 120, a seawater cooling tower 160, a first conductivity meter 211, a second conductivity meter 212, a third conductivity meter 213, a first alkalinity online analyzer 221, and a second alkalinity online analyzer 222. Figure 1 ​​​​As shown, the seawater circulating cooling system comprises a make-up valve 110, a blowdown valve 120, a cooling tower basin 130, a circulating water pump 140, a condenser 150, and a seawater cooling tower 160. The make-up valve 110, the cooling tower basin 130, the circulating water pump 140, and the condenser 150 are sequentially connected by pipes to allow water flow. The condenser 150 is connected by a pipe to the blowdown valve 120 and the seawater cooling tower 160. Seawater enters from a make-up port, passes through the make-up valve 110 to the cooling tower basin 130, and then passes through the circulating water pump 140 to the condenser 150, and then returns to the seawater cooling tower 160 or is discharged from a blowdown port through the blowdown valve 120. The make-up valve 110 is arranged near the make-up port, and the blowdown valve 120 is arranged near the blowdown port.

[0057] It should be understood that, Figure 1 The structure shown is only a block diagram of a seawater circulating cooling system, and the seawater circulating cooling system can further comprise more or fewer components than those shown in Figure 1 or have a different configuration than that shown in Figure 1 . Figure 1 The components shown in the above can be implemented in hardware, software, or a combination thereof.

[0058] Based on the seawater circulating cooling system described above, a possible implementation of a scale control method is given below. The scale control method provided by the present disclosure can be applied to a controller.

[0059] The controller is electrically connected to the make-up valve 110 and the blowdown valve 120, and an electrical conductivity meter is arranged at the inlet of the condenser 150, the outlet of the condenser 150, and the cooling tower basin 130. An alkalinity online analyzer is arranged at the make-up port and the circulating water pump 140. The electrical conductivity meter and the alkalinity online analyzer are electrically connected to the controller.

[0060] Please refer to Figure 2 , Figure 2 is a flowchart of a scale control method applied to a seawater circulating cooling system according to an exemplary embodiment. The scale control method applied to the seawater circulating cooling system can comprise the following steps:

[0061] Step S1, obtaining a chloride ion concentration ratio and an alkalinity concentration ratio of the seawater circulating cooling system.

[0062] The chloride ion concentration ratio can be the ratio of the chloride ion concentration in the circulating water to the chloride ion concentration in the make-up water, and the alkalinity concentration ratio can be the ratio of the alkali concentration in the circulating water to the alkali concentration in the make-up water.

[0063] It can be understood that step S1 comprises obtaining the chloride ion concentration ratio of the seawater circulating cooling system and obtaining the alkalinity concentration ratio of the seawater circulating cooling system.

[0064] The chloride ion concentration ratio of the seawater circulating cooling system can be obtained by obtaining the chloride ion concentration in the circulating water and the chloride ion concentration in the makeup water respectively, and then performing ratio calculation. The chloride ion concentration ratio of the seawater circulating cooling system can also be obtained by detecting the properties of the water in the seawater circulating cooling system through instruments and meters, and then inversely deducing the chloride ion concentration ratio according to the calibration relationship between the property detection result and the chloride ion concentration ratio.

[0065] The alkalinity concentration ratio of the seawater circulating cooling system can be obtained by obtaining the alkali concentration in the circulating water and the alkali concentration in the makeup water respectively, and then performing ratio calculation. The alkalinity concentration ratio of the seawater circulating cooling system can also be obtained by detecting the properties of the water in the seawater circulating cooling system through instruments and meters, and then inversely deducing the alkalinity concentration ratio according to the calibration relationship between the property detection result and the alkalinity concentration ratio.

[0066] Step S2, obtaining a concentration ratio difference according to the chloride ion concentration ratio and the alkalinity concentration ratio.

[0067] The concentration ratio difference can be the difference between the chloride ion concentration ratio and the alkalinity concentration ratio.

[0068] Step S3, controlling the opening and closing states of the makeup water valve 110 and the drain valve 120 of the seawater circulating cooling system according to the concentration ratio difference, so as to control the makeup water and the drain water of the seawater circulating cooling system, thereby controlling the fouling condition.

[0069] Through the above technical solution, the concentration ratio difference obtained by the chloride ion concentration ratio and the alkalinity concentration ratio of the seawater circulating cooling system is used to control the opening and closing states of the makeup water valve 110 and the drain valve 120 of the seawater circulating cooling system, so as to control the makeup water and the drain water of the seawater circulating cooling system, thereby changing the concentration ratio in the seawater circulating cooling system, reducing the concentration ratio fluctuation, and reducing the fouling.

[0070] In a possible implementation, the alkali concentration concentration ratio of the seawater circulating cooling system is obtained, please refer to Figure 3 may include steps S11-S13:

[0071] Step S11, obtaining a first alkali concentration of a makeup water inlet of the seawater circulating cooling system.

[0072] The first alkali concentration can be the alkali concentration detected by the first alkali online analyzer 221, which represents the alkali concentration of the makeup water. The first alkali online analyzer 221 is an alkali online analyzer arranged at the makeup water inlet.

[0073] Step S12, obtaining a second alkali concentration of the circulating water pump 140 of the seawater circulating cooling system.

[0074] The second alkali concentration can be the alkali concentration detected by the second alkali online analyzer 222, which represents the alkali concentration of the circulating water. The second alkali online analyzer 222 is an alkali online analyzer arranged at the circulating water pump 140.

[0075] In step S13, the alkalinity concentration ratio is obtained according to the first alkalinity concentration and the second alkalinity concentration.

[0076] The alkalinity concentration ratio can be a ratio of the second alkalinity concentration and the first alkalinity concentration.

[0077] The calculation formula of the alkalinity concentration ratio is:

[0078] K1=C2 / C1;

[0079] Wherein, K1 is the alkalinity concentration ratio, C2 is the second alkalinity concentration, and C1 is the first alkalinity concentration.

[0080] That is, the alkalinity concentration ratio is calculated by respectively obtaining the second alkalinity concentration representing the alkalinity concentration of the circulating water and the first alkalinity concentration representing the alkalinity concentration of the make-up water.

[0081] In one possible implementation, the chloride ion concentration ratio of the seawater circulating cooling system is obtained, please refer to Figure 4 The method can include steps S14-S18:

[0082] In step S14, the first conductivity in the cooling tower basin 130 of the seawater circulating cooling system is obtained.

[0083] The first conductivity can be the conductivity detected by the first conductivity instrument 211. The first conductivity is the conductivity instrument arranged in the cooling tower basin 130.

[0084] In step S15, the second conductivity at the inlet of the condenser 150 of the seawater circulating cooling system is obtained.

[0085] The second conductivity can be the conductivity detected by the second conductivity instrument 212. The second conductivity is the conductivity instrument arranged at the inlet of the condenser 150.

[0086] In step S16, the third conductivity at the outlet of the condenser 150 of the seawater circulating cooling system is obtained.

[0087] The third conductivity can be the conductivity detected by the third conductivity instrument 213. The third conductivity is the conductivity instrument arranged at the outlet of the condenser 150.

[0088] In step S17, the average conductivity is obtained according to the first conductivity, the second conductivity, and the third conductivity.

[0089] The average conductivity is the average of the first conductivity, the second conductivity, and the third conductivity.

[0090] In step S18, the chloride ion concentration ratio corresponding to the average conductivity is obtained according to the average conductivity and the preset corresponding relationship between the conductivity and the chloride ion concentration ratio.

[0091] The preset correspondence between the conductivity and the chloride ion concentration ratio can be a linear model of the chloride ion concentration ratio and the conductivity. The linear model takes the average conductivity as an input value and outputs the chloride ion concentration ratio.

[0092] The dissolved salt in seawater has a certain conductivity, and the higher the chloride ion concentration ratio of seawater is, the stronger the conductivity of seawater is. Therefore, the chloride ion concentration ratio can be indirectly obtained by establishing a linear relationship model between the conductivity of seawater circulating water and the seawater circulating water concentration ratio.

[0093] The linear relationship model between the seawater circulating water concentration ratio and the conductivity is established by inputting the average conductivity into the linear relationship model between the seawater circulating water concentration ratio and the conductivity, and using the data of the conductivity and the chloride ion concentration ratio in the operation of the real seawater circulating cooling system. The online conductivity data are used as the input value of the model, and the chloride ion concentration ratio is used as the output value. The conductivity value is obtained by monitoring the online instrument, and is corrected by using the temperature coefficient. The chloride ion concentration ratio value is measured by the laboratory titration method, and the correlation formula is correlated by the linear equation. The conductivity parameter range of the model covers the entire operation range, and the chloride ion concentration ratio can be from 1 times to 3 times. The chloride ion concentration ratio of the seawater circulating cooling system is predicted according to the input average conductivity parameter.

[0094] In other embodiments, the first conductivity, the second conductivity and the third conductivity can also be pretreated. The pretreatment can be data cleaning and outlier detection. Data cleaning mainly refers to analyzing the data to determine whether there is data missing and whether the data transmission is normal. After confirming that the data is normal, the outlier detection is performed. The data is input into the historical data "five-number summary method" model to identify outliers, and compared with the set upper and lower limits of the normal value. The values outside the range are marked as outliers and an abnormal alarm is given. The conductivities within the upper and lower limits of the normal value are used for later calculation. The online instrument can also be checked regularly, and the probe can be cleaned and maintained to ensure the accuracy of the detection data.

[0095] In other embodiments, a larger number of conductivity meters can also be arranged at other positions to ensure the comprehensiveness of the detection.

[0096] In a possible implementation, the calculation formula of the concentration ratio difference is:

[0097] ΔA = K2 - K1;

[0098] Wherein, ΔA is the concentration ratio difference, K2 is the chloride ion concentration ratio, and K1 is the alkalinity concentration ratio.

[0099] In a possible implementation, the opening and closing states of the makeup valve 110 and the drain valve 120 of the seawater circulating cooling system are controlled according to the difference value of the concentration ratio, please refer to Figure 5 The method can include the following sub-steps:

[0100] In step S31, the difference value of the concentration ratio is compared with a preset difference threshold value, to obtain a first comparison result.

[0101] In step S32, when the difference value of the concentration ratio is greater than the preset difference threshold value, the makeup valve 110 and the drain valve 120 of the seawater circulating cooling system are controlled to be opened.

[0102] In step S33, when the difference value of the concentration ratio is less than or equal to the preset difference threshold value, the opening degrees of the makeup valve 110 and the drain valve 120 of the seawater circulating cooling system are adjusted according to the concentration ratio of the chloride ion.

[0103] The preset difference threshold value can be a limit value of the occurrence of the scaling condition obtained according to experience, for example, 0.2. When the difference value of the concentration ratio is greater than the preset difference threshold value, it indicates that the scaling condition occurs, at this time, the makeup valve 110 of the seawater circulating cooling system is controlled to be opened for makeup, and the drain valve 120 is controlled to be opened for drainage, so as to reduce the concentration ratio of the chloride ion and the concentration ratio of the alkalinity, thereby reducing the scaling. When the difference value of the concentration ratio is less than or equal to the preset difference threshold value, it indicates that the scaling condition has not occurred, at this time, the opening degrees of the makeup valve 110 and the drain valve 120 of the seawater circulating cooling system can be adjusted in advance according to the concentration ratio of the chloride ion, so as to avoid the occurrence of the scaling condition in advance.

[0104] In a possible implementation, the opening and closing states of the makeup valve 110 and the drain valve 120 of the seawater circulating cooling system are controlled according to the concentration ratio of the chloride ion, please refer to Figure 6 The method can include the following sub-steps:

[0105] In step S331, the concentration ratio of the chloride ion is compared with a preset range, to obtain a second comparison result.

[0106] In step S332, when the concentration ratio of the chloride ion is in the preset range, the opening degrees of the makeup valve 110 and the drain valve 120 are reduced.

[0107] In step S333, when the concentration ratio of the chloride ion is not in the preset range, the opening degrees of the makeup valve 110 and the drain valve 120 are increased.

[0108] The preset range can be a normal value range of the chloride ion concentration ratio obtained empirically. For example, 0-2.2. When the chloride ion concentration ratio is in the preset range, the chloride ion concentration ratio is normal, at this time, the opening of the makeup valve 110 and the drain valve 120 is controlled to be reduced, the chloride ion concentration ratio is maintained, and the current state is kept. When the chloride ion concentration ratio is not in the preset range, the chloride ion concentration ratio is abnormal, at this time, the opening of the makeup valve 110 and the drain valve 120 is controlled to be increased, and the chloride ion concentration ratio is reduced to restore to the normal range.

[0109] In other embodiments, a liquid level meter can also be placed in the cooling tower basin 130 for monitoring the liquid level stability of the cooling tower basin 130. When the liquid level is lowered, the opening of the makeup valve 110 is increased for makeup; when the liquid level is raised, the opening of the drain valve 120 is increased for drainage.

[0110] In a possible implementation, the method further comprises:

[0111] When the concentration ratio difference is greater than the preset difference threshold value, the chloride ion concentration ratio of the seawater circulating cooling system is taken as the controlled quantity, and the difference between the obtained chloride ion concentration ratio and the input chloride ion concentration ratio set value is taken as the error, and the proportional integral derivative adjustment is performed on the chloride ion concentration ratio of the seawater circulating cooling system.

[0112] Generally, the seawater circulating cooling system is large in scale, and the volume of a super-large seawater circulating cooling system can reach 40,000-60,000 cubic meters. Any control action of the concentration ratio has a certain hysteresis, and the proportional integral derivative adjustment control method is used to adjust the chloride ion concentration ratio, so that the hysteresis of the controlled parameter due to the large volume can be reduced.

[0113] To implement the above method embodiment, the embodiment provides a scaling control device 300 applied to a seawater circulating cooling system, as shown in Figure 7 , and Figure 7 is a block diagram of a scaling control device applied to a seawater circulating cooling system according to an example embodiment. The scaling control device 300 applied to the seawater circulating cooling system can include a concentration ratio acquisition module 301, a ratio difference acquisition module 302, and a valve control module 303.

[0114] The concentration ratio acquisition module 301 is configured to acquire the chloride ion concentration ratio and the alkalinity concentration ratio of the seawater circulating cooling system.

[0115] The ratio difference acquisition module 302 is configured to obtain a concentration ratio difference according to the chloride ion concentration ratio and the alkalinity concentration ratio.

[0116] The valve control module 303 is configured to control the opening and closing states of the water supply valve 110 and the water discharge valve 120 of the seawater circulating cooling system according to the concentration ratio difference, so as to control the water supply and water discharge of the seawater circulating cooling system, thereby controlling the fouling condition.

[0117] Optionally, the concentration ratio obtaining module 301 comprises an alkalinity concentration ratio obtaining unit and a chloride ion concentration ratio obtaining unit.

[0118] The alkalinity concentration ratio obtaining unit is configured to:

[0119] obtain a first alkali concentration of a water supply port of the seawater circulating cooling system;

[0120] obtain a second alkali concentration of a circulating water pump 140 of the seawater circulating cooling system;

[0121] obtain an alkalinity concentration ratio according to the first alkali concentration and the second alkali concentration.

[0122] Optionally, the calculation formula of the alkalinity concentration ratio is:

[0123] K1 = C2 / C1;

[0124] wherein K1 is the alkalinity concentration ratio, C2 is the second alkali concentration, and C1 is the first alkali concentration.

[0125] The chloride ion concentration ratio obtaining unit is configured to:

[0126] obtain a first electrical conductivity in a cooling tower pool 130 of the seawater circulating cooling system;

[0127] obtain a second electrical conductivity at an inlet of a condenser 150 of the seawater circulating cooling system;

[0128] obtain a third electrical conductivity at an outlet of the condenser 150 of the seawater circulating cooling system;

[0129] obtain an average electrical conductivity according to the first electrical conductivity, the second electrical conductivity, and the third electrical conductivity;

[0130] obtain a chloride ion concentration ratio corresponding to the average electrical conductivity according to a preset corresponding relationship between electrical conductivities and chloride ion concentration ratios.

[0131] Optionally, the calculation formula of the concentration ratio difference is:

[0132] △A = K2-K1;

[0133] wherein △A is the concentration ratio difference, K2 is the chloride ion concentration ratio, and K1 is the alkalinity concentration ratio.

[0134] Optionally, the valve control module 303 comprises a first comparison unit, a first valve control unit, and a second valve control unit.

[0135] The first comparison unit is configured to compare the concentration ratio difference with a preset difference threshold to obtain a first comparison result.

[0136] The first valve control unit is configured to control the opening of the seawater makeup valve 110 and the seawater drain valve 120 of the seawater circulating cooling system when the concentration ratio difference is greater than the preset difference threshold.

[0137] The second valve control unit is configured to adjust the opening of the seawater makeup valve 110 and the seawater drain valve 120 of the seawater circulating cooling system according to the chloride ion concentration ratio when the concentration ratio difference is less than or equal to the preset difference threshold.

[0138] Optionally, the second valve control unit is specifically configured to:

[0139] compare the chloride ion concentration ratio with a preset range to obtain a second comparison result;

[0140] decrease the opening of the seawater makeup valve 110 and the seawater drain valve 120 when the chloride ion concentration ratio is in the preset range;

[0141] increase the opening of the seawater makeup valve 110 and the seawater drain valve 120 when the chloride ion concentration ratio is not in the preset range.

[0142] Optionally, the first valve control unit is further configured to:

[0143] when the concentration ratio difference is greater than the preset difference threshold, perform proportional-integral-derivative adjustment on the chloride ion concentration ratio of the seawater circulating cooling system, taking the chloride ion concentration ratio of the seawater circulating cooling system as a controlled variable, and taking the difference between the obtained chloride ion concentration ratio and the input chloride ion concentration ratio set value as an error.

[0144] As to the device in the above-mentioned embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

[0145] The present disclosure also provides a controller, which comprises a processor and a memory. The memory is configured to store a computer program, and the processor is configured to execute the computer program to perform the steps of any of the above-mentioned methods for controlling the scaling of the seawater circulating cooling system.

[0146] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0147] It should also be noted that various technical features described in the above detailed description are capable of being combined in any suitable manner unless otherwise explicitly stated. To avoid unnecessary repetition, various possible combinations of features are not all explicitly described in the present disclosure.

[0148] Furthermore, various embodiments of the present disclosure can be combined in any suitable manner, as long as it does not contradict the idea of the present disclosure, and it should be considered as disclosed in the present disclosure.

Claims

1. A method for controlling scaling in a seawater circulating cooling system, characterized in that, include: Obtain the chloride ion concentration ratio and alkalinity concentration ratio of the seawater circulation cooling system; The concentration ratio difference is obtained based on the chloride ion concentration ratio and the alkalinity concentration ratio. Based on the concentration ratio difference, the on / off state of the water supply valve and the water drain valve of the seawater circulation cooling system is controlled to control the water supply and drainage of the seawater circulation cooling system, thereby controlling the scaling situation. The process of obtaining the alkali concentration concentration ratio of the seawater circulating cooling system includes: Obtain the first alkali concentration at the water inlet of the seawater circulation cooling system; Obtain the second alkali concentration of the circulating water pump in the seawater circulating cooling system; The alkalinity concentration ratio is obtained based on the first alkali concentration and the second alkali concentration.

2. The method according to claim 1, characterized in that, The formula for calculating the alkalinity concentration ratio is: K1 = C2 / C1; Wherein, K1 is the alkalinity concentration ratio, C2 is the second alkali concentration, and C1 is the first alkali concentration.

3. The method according to claim 1, characterized in that, Obtain the chloride ion concentration ratio of the seawater circulating cooling system, including: Obtain the first conductivity of the cooling tower pool in the seawater circulation cooling system; Obtain the second conductivity of the condenser inlet of the seawater circulating cooling system; Obtain the third conductivity of the condenser outlet of the seawater circulating cooling system; The average conductivity is obtained based on the first conductivity, the second conductivity, and the third conductivity. Based on the average conductivity and the preset correspondence between conductivity and chloride ion concentration ratio, the chloride ion concentration ratio corresponding to the average conductivity is obtained.

4. The method according to claim 1, characterized in that, The formula for calculating the concentration ratio difference is: △A = K2 - K1; Wherein, △A is the concentration ratio difference, K2 is the chloride ion concentration ratio, and K1 is the alkalinity concentration ratio.

5. The method according to claim 1, characterized in that, The step of controlling the on / off state of the water supply valve and the water drain valve of the seawater circulation cooling system based on the concentration ratio difference includes: The concentration ratio difference is compared with a preset difference threshold to obtain a first comparison result; When the concentration ratio difference is greater than the preset difference threshold, the water supply valve and drain valve of the seawater circulation cooling system are opened. When the concentration ratio difference is less than or equal to the preset difference threshold, the opening degree of the water supply valve and the water drain valve of the seawater circulation cooling system is adjusted according to the chloride ion concentration ratio.

6. The method according to claim 5, characterized in that, The step of adjusting the opening degree of the water supply valve and the water drain valve of the seawater circulation cooling system according to the chloride ion concentration ratio includes: The chloride ion concentration ratio is compared with a preset range to obtain a second comparison result; When the chloride ion concentration ratio is within the preset range, reduce the opening of the water supply valve and the drain valve; When the chloride ion concentration ratio is not within the preset range, increase the opening of the water supply valve and the drain valve.

7. The method according to claim 5, characterized in that, The method further includes: When the concentration ratio difference is greater than the preset difference threshold, the chloride ion concentration ratio of the seawater circulation cooling system is controlled by the chloride ion concentration ratio of the seawater circulation cooling system, and the difference between the obtained chloride ion concentration ratio and the input chloride ion concentration ratio setting value is the error. The chloride ion concentration ratio of the seawater circulation cooling system is then adjusted by proportional-integral-derivative method.

8. A scaling control device for a seawater circulating cooling system, characterized in that, The device includes: The concentration ratio acquisition module is used to acquire the chloride ion concentration ratio and alkalinity concentration ratio of the seawater circulation cooling system. The ratio difference acquisition module is used to obtain the concentration ratio difference based on the chloride ion concentration ratio and the alkalinity concentration ratio; The valve control module is used to control the opening and closing states of the water supply valve and the water drain valve of the seawater circulation cooling system according to the concentration ratio difference, so as to control the water supply and drainage of the seawater circulation cooling system and thus control the scaling situation. The concentration ratio acquisition module includes an alkalinity concentration ratio acquisition unit, which is used to: acquire the first alkalinity concentration at the water inlet of the seawater circulation cooling system; acquire the second alkalinity concentration at the circulating water pump of the seawater circulation cooling system; and obtain the alkalinity concentration ratio based on the first and second alkalinity concentrations.

9. A controller, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-7.

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