A marine water quality treatment device and system with low resin consumption

Abstract

This invention relates to a marine water treatment device and system with low resin consumption, comprising: a deoxygenating resin exchanger; a deoxygenating three-way regulating valve having ports A, B, and C, wherein port A is connected to the condensate inlet, port B is connected to the inlet of the deoxygenating resin exchanger; a desalination resin exchanger; and a desalination three-way regulating valve having ports D, E, and F, wherein port D is simultaneously connected to port C and the outlet of the deoxygenating resin exchanger, port E is connected to the inlet of the desalination resin exchanger, and port F and the outlet of the desalination resin exchanger are both connected to the feedwater outlet. By setting the three-way regulating valve to adjust the water flow ratio entering the resin exchanger, the condensate flow rate entering the resin exchanger is effectively reduced, solving the problem of excessive consumption of deoxygenating and desalination resin in existing water treatment systems, shortening the resin working layer thickness, reducing resin consumption, and extending resin life.

Description

Technical Field

[0001] This invention relates to the field of water chemistry for marine nuclear power systems, and particularly to a marine water treatment device and system with low resin consumption. Background Technology

[0002] Currently, the feedwater for ship OTSG (direct current steam generator) uses desalination and deoxygenation resin water treatment methods. Condensate with substandard water quality can be treated to meet the water quality standards by passing through the deoxygenation and desalination resin exchanger.

[0003] In related technologies, in order to save on resin usage, existing water treatment methods bypass the deoxygenation resin exchanger through a bypass when the dissolved oxygen in the condensate meets the standard; bypass the desalination resin exchanger through a bypass when the conductivity of the condensate meets the standard; and when a certain water quality parameter of the condensate fails to meet the standard, the entire flow of condensate passes through the corresponding resin exchanger.

[0004] However, due to the characteristics of resin exchangers, the dissolved oxygen and conductivity of the feedwater flowing out of the resin exchanger are far below the OTSG feedwater quality requirements. That is, the dissolved oxygen and ions far exceeding the demand are removed by the resin exchanger, which leads to increased resin consumption, shortened resin life, increased resin replacement frequency, and reduced reliability, maintainability and economy of the ship's power system. Summary of the Invention

[0005] This invention provides a marine water treatment device and system with low resin consumption to solve the problems of increased resin consumption, shortened resin life, and increased resin replacement frequency in related technologies.

[0006] In a first aspect, a marine water treatment device with low resin consumption is provided, comprising: a deoxygenating resin exchanger; a deoxygenating three-way regulating valve having a port A, a port B, and a port C, wherein port A is connected to a condensate inlet, and port B is connected to the inlet of the deoxygenating resin exchanger; a desalination resin exchanger; and a desalination three-way regulating valve having a port D, a port E, and a port F, wherein port D is simultaneously connected to port C and the outlet of the deoxygenating resin exchanger, port E is connected to the inlet of the desalination resin exchanger, and port F and the outlet of the desalination resin exchanger are both connected to a feedwater outlet.

[0007] In some embodiments, the connecting pipe between port A and the condensate inlet is provided with a condensate water quality monitoring port; the connecting pipe between port D and the deoxygenated resin exchanger is provided with a deoxygenated water quality monitoring port.

[0008] In some embodiments, the branch pipes of port C and the deoxygenated resin exchanger converge into the main pipe and are connected to port D. The main pipe is provided with a desalination inlet water quality monitoring port; the connecting pipe between the desalination resin exchanger and the water supply outlet is provided with a desalination post-water quality monitoring port.

[0009] Secondly, a water treatment system for a marine low-resin-consumption water treatment device is provided, comprising: a first control module for controlling condensate to enter through port A of a deoxygenation three-way regulating valve, with a portion flowing into a deoxygenation resin exchanger through port B for deoxygenation, and the other portion flowing out through port C; and a second control module for controlling the deoxygenated water flowing out of the deoxygenation resin exchanger and port C to enter through port D of a desalination three-way regulating valve, with a portion flowing into a desalination resin exchanger through port E for desalination, and the other portion flowing out through port F.

[0010] In some embodiments, a condensate water quality monitoring port is provided on the connecting pipe between port A and the condensate inlet; the water treatment system further includes a first judgment module, which is signal-connected to the first control module. The first judgment module is used to determine whether the dissolved oxygen (O3) content of the condensate measured by the condensate water quality monitoring port is greater than the dissolved oxygen (O) content required for the feed water quality; the first control module is also used to control the condensate to enter through port A of the deaeration three-way regulating valve when the first judgment module determines that the dissolved oxygen (O3) content of the condensate is greater than the dissolved oxygen (O) content required for the feed water quality, otherwise control the condensate to flow through the bypass pipe of the deaeration exchange column.

[0011] In some embodiments, a condensate water quality monitoring port is provided on the connecting pipe between port A and the condensate inlet, and a deoxygenated water quality monitoring port is provided on the connecting pipe between port D and the deoxygenated resin exchanger; the water treatment system further includes a first calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenated resin exchanger from the deoxygenated three-way regulating valve to the total condensate flow rate N, based on the condensate dissolved oxygen O3 measured by the condensate water quality monitoring port, the deoxygenated dissolved oxygen O6 measured by the deoxygenated water quality monitoring port, and the required dissolved oxygen O for the feedwater. o The first control module is further configured to, when the first calculation module calculates the ratio B of the flow rate B entering the deoxygenated resin exchanger through the deoxygenated three-way regulating valve to the total condensate flow rate N, o Then, according to the stated ratio B o Control the flow rate entering the deoxygenated resin exchanger.

[0012] In some embodiments, the water treatment system further includes a second calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenated resin exchanger to the total condensate flow rate N. o Calculate the input current I of the deaerator three-way regulating valve based on the input current regulation function g and the total condensate flow rate N. o The first control module is also used to control the current I. o Input the deoxygenation three-way regulating valve.

[0013] In some embodiments, the C port and the branch pipes of the deoxygenated resin exchanger converge into the main pipe and are connected to the D port. The main pipe is provided with a desalination inlet water quality monitoring port. The water treatment system also includes a second judgment module, which is used to determine whether the desalination inlet conductivity D4 measured by the desalination inlet water quality monitoring port is greater than the required conductivity D of the feed water quality. The second control module is also used to control the deoxygenated water to enter through the D port of the desalination three-way regulating valve when the second judgment module determines that the desalination inlet conductivity D4 is greater than the required conductivity D of the feed water quality, otherwise control the deoxygenated water to flow through the bypass pipe of the desalination exchange column.

[0014] In some embodiments, the branch pipes of port C and the deaerator resin exchanger converge into a main pipe and are connected to port D. The main pipe is equipped with a desalination inlet water quality monitoring port. The connection pipe between the desalination resin exchanger and the water supply outlet is equipped with a post-desalination water quality monitoring port. The water treatment system further includes a third calculation module, which is used to calculate the ratio B of the flow rate entering the desalination resin exchanger from the desalination three-way regulating valve to the total condensate flow rate N, based on the desalination inlet conductivity D4 measured at the desalination inlet water quality monitoring port, the post-desalination conductivity D7 measured at the post-desalination water quality monitoring port, and the required conductivity D of the water supply. d The second control module is further configured to, when the third calculation module calculates the ratio B of the flow rate B entering the desalination resin exchanger through the desalination three-way regulating valve to the total condensate flow rate N, d Then, according to the stated ratio B d Control the flow rate entering the desalination resin exchanger.

[0015] In some embodiments, the water treatment system further includes a fourth calculation module, which is used to calculate based on the ratio B of the flow rate entering the desalination resin exchanger to the total condensate flow rate N. d Calculate the input current I of the desalination three-way regulating valve based on the input current regulation function g and the total condensate flow rate N. d The second control module is also used to control the current I. d Input the desalination three-way regulating valve.

[0016] The beneficial effects of the technical solution provided by this invention include:

[0017] This invention provides a marine water treatment device and system with low resin consumption. By setting a three-way regulating valve to adjust the water flow ratio entering the resin exchanger, only a portion of the condensate is treated. The treated water is then mixed with the untreated water, thereby ensuring that the overall feedwater quality meets the requirements. This effectively reduces the condensate flow rate entering the resin exchanger, solves the problem of excessive consumption of deoxygenation and desalination resin in existing water treatment systems, shortens the resin working layer thickness, reduces resin consumption, extends resin life, reduces resin replacement frequency, and improves the reliability, maintainability, and economy of the ship's power system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a marine water treatment device with low resin consumption provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the deoxygenation process of a marine low-resin-consumption water treatment system provided in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the desalination process of a marine low-resin-consumption water treatment system provided in an embodiment of the present invention.

[0022] Numbering on the map:

[0023] 1. Condensate inlet; 2. Feedwater outlet; 3. Condensate water quality monitoring port; 4. Desalination inlet water quality monitoring port; 5. Feedwater water quality monitoring port; 6. Deoxygenated water quality monitoring port; 7. Desalination water quality monitoring port; 8. Deoxygenated three-way regulating valve; 9. Desalination three-way regulating valve; 10. Deoxygenated resin exchanger; 11. Desalination resin exchanger. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides a marine water treatment device and system with low resin consumption, which can solve the problems of increased resin consumption, shortened resin life, and increased resin replacement frequency in related technologies.

[0026] See Figure 1 As shown, this invention provides a marine water treatment device with low resin consumption, which may include: a deoxygenating resin exchanger 10; a deoxygenating three-way regulating valve 8 having ports A, B, and C, wherein port A is connected to the condensate inlet 1, port B is connected to the inlet of the deoxygenating resin exchanger 10; a desalination resin exchanger 11; and a desalination three-way regulating valve 9 having ports D, E, and F, wherein port D is connected to both port C and the outlet of the deoxygenating resin exchanger 10, port E is connected to the inlet of the desalination resin exchanger 11, and port F and the outlet of the desalination resin exchanger 11 are both connected to the water supply outlet 2.

[0027] In this embodiment, by setting a three-way regulating valve to adjust the water flow ratio entering the resin exchanger, only a portion of the condensate is treated. The treated water is then mixed with the untreated water, thereby ensuring that the overall water quality meets the requirements. This effectively reduces the condensate flow rate entering the resin exchanger, solves the problem of excessive consumption of deoxygenation and desalination resin in existing water treatment systems, shortens the resin working layer thickness, reduces resin consumption, extends resin life, reduces resin replacement frequency, and improves the reliability, maintainability, and economy of the ship's power system.

[0028] See Figure 1 As shown, in some embodiments, a condensate water quality monitoring port 3 is provided on the connecting pipe between port A and condensate inlet 1; a deoxygenated water quality monitoring port 6 is provided on the connecting pipe between port D and the deoxygenated resin exchanger 10. In this embodiment, by setting the condensate water quality monitoring port 3, the dissolved oxygen (O3) content of the condensate can be measured. When the dissolved oxygen (O3) content of the condensate is greater than the dissolved oxygen (O) content required for the feedwater quality, the condensate is controlled to enter through port A of the deoxygenation three-way regulating valve 8; otherwise, the condensate is controlled to flow through the bypass pipe of the deoxygenation exchange column. By setting the deoxygenated water quality monitoring port 6, the dissolved oxygen (O6) content after deoxygenation can be measured. Based on the dissolved oxygen (O3) of the condensate, the dissolved oxygen (O6) after deoxygenation, and the dissolved oxygen (O) required for the feedwater quality, the ratio B of the flow rate entering the deoxygenated resin exchanger 10 from the deoxygenation three-way regulating valve 8 to the total condensate flow rate N is calculated. o This ensures that the water quality flowing out of the water treatment system meets the water supply requirements and reduces the consumption of deoxygenating resin.

[0029] See Figure 1As shown, in some embodiments, the branch pipes of port C and the deaerator resin exchanger 10 converge into the main pipe and are connected to port D. The main pipe is equipped with a desalination inlet water quality monitoring port 4; the connection pipe between the desalination resin exchanger 11 and the feedwater outlet 2 is equipped with a desalination post-water quality monitoring port 7. In this embodiment, by setting the desalination inlet water quality monitoring port 4, the desalination inlet conductivity D4 can be measured. When the desalination inlet conductivity D4 is greater than the required feedwater conductivity D, the deaerator water is controlled to enter through port D of the desalination three-way regulating valve 9; otherwise, the deaerator water is controlled to flow through the desalination exchange column bypass pipe. By setting the desalination post-water quality monitoring port 7, the desalination post-water conductivity D7 can be measured. Based on the desalination inlet conductivity D4, the desalination post-water conductivity D7, and the required feedwater conductivity D, the ratio B of the flow rate entering the desalination three-way regulating valve 9 from the desalination three-way regulating valve 9 to the total condensate flow rate N is calculated. d This ensures that the water quality flowing out of the water treatment system meets the water supply requirements and reduces the consumption of deoxygenating resin.

[0030] See Figure 1 As shown in the figure, a water treatment system for a marine low-resin-consumption water treatment device provided by an embodiment of the present invention may include: a first control module, which controls condensate to enter through port A of the deoxygenation three-way regulating valve 8, and part of it to flow into the deoxygenation resin exchanger 10 through port B for deoxygenation, and the other part to flow out through port C; a second control module, which controls the deoxygenated water flowing out of the deoxygenation resin exchanger 10 and port C to enter through port D of the desalination three-way regulating valve 9, and part of it to flow into the desalination resin exchanger 11 through port E for desalination, and the other part to flow out through port F.

[0031] See Figure 2 As shown, in some embodiments, a condensate water quality monitoring port 3 is provided on the connecting pipe between port A and condensate inlet 1; the water treatment system further includes a first judgment module, which is signal-connected to the first control module. The first judgment module is used to determine whether the dissolved oxygen (O3) content of the condensate measured by the condensate water quality monitoring port 3 is greater than the dissolved oxygen (O) content required for the feed water quality; the first control module is also used to control the condensate to enter through port A of the deaeration three-way regulating valve 8 when the first judgment module determines that the dissolved oxygen (O3) content of the condensate is greater than the dissolved oxygen (O) content required for the feed water quality, otherwise control the condensate to flow through the bypass pipe of the deaeration exchange column.

[0032] See Figure 2As shown, in some embodiments, a condensate water quality monitoring port 3 is provided on the connecting pipe between port A and condensate inlet 1, and a deoxygenated water quality monitoring port 6 is provided on the connecting pipe between port D and the deoxygenated resin exchanger 10; the water treatment system further includes a first calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenated resin exchanger 10 from the deoxygenated three-way regulating valve 8 to the total condensate flow rate N, based on the condensate dissolved oxygen O3 measured by the condensate water quality monitoring port 3, the deoxygenated dissolved oxygen O6 measured by the deoxygenated water quality monitoring port 6, and the required dissolved oxygen O for the feedwater. o The first control module is further configured to, when the first calculation module calculates the ratio B of the flow rate entering the deoxygenating resin exchanger 10 through the deoxygenating three-way regulating valve 8 to the total condensate flow rate N, o Then, according to the stated ratio B o The flow rate entering the deoxygenated resin exchanger 10 is controlled.

[0033] See Figure 2 As shown, in some embodiments, the water treatment system further includes a second calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenated resin exchanger 10 to the total condensate flow rate N. o The input current adjustment function g of the three-way regulating valve and the total condensate flow rate N are used to calculate the current I input to the deaerator three-way regulating valve 8. o The first control module is also used to control the current I. o Input the deoxygenation three-way regulating valve 8.

[0034] See Figure 3 As shown, in some embodiments, the C port and the branch pipes of the deoxygenated resin exchanger 10 converge into the main pipe and are connected to the D port. The main pipe is provided with a desalination inlet water quality monitoring port 4. The water treatment system also includes a second judgment module, which is used to determine whether the desalination inlet conductivity D4 measured by the desalination inlet water quality monitoring port 4 is greater than the required conductivity D of the feed water quality. The second control module is also used to control the deoxygenated water to enter through the D port of the desalination three-way regulating valve 9 when the second judgment module determines that the desalination inlet conductivity D4 is greater than the required conductivity D of the feed water quality. Otherwise, it controls the deoxygenated water to flow through the bypass pipe of the desalination exchange column.

[0035] See Figure 3As shown, in some embodiments, the branch pipes of port C and the deaerator resin exchanger 10 converge into the main pipe and are connected to port D. The main pipe is equipped with a desalination inlet water quality monitoring port 4; the connection pipe between the desalination resin exchanger 11 and the water supply outlet 2 is equipped with a desalination post-water quality monitoring port 7; the water treatment system also includes a third calculation module, which is used to calculate the ratio B of the flow rate entering the desalination resin exchanger 11 from the desalination three-way regulating valve 9 to the total condensate flow rate N, based on the desalination inlet conductivity D4 measured by the desalination inlet water quality monitoring port 4, the desalination post-water quality monitoring port 7 measured by the desalination post-water quality monitoring port 7, and the required conductivity D of the water supply. d The second control module is further configured to, when the third calculation module calculates the ratio B of the flow rate entering the desalination resin exchanger 11 through the desalination three-way regulating valve 9 to the total condensate flow rate N, d Then, according to the stated ratio B d The flow rate entering the desalination resin exchanger 11 is controlled.

[0036] See Figure 3 As shown, in some embodiments, the water treatment system further includes a fourth calculation module, which is used to calculate the ratio B of the flow rate entering the desalination resin exchanger 11 to the total condensate flow rate N. d The input current adjustment function g of the three-way regulating valve and the total condensate flow rate N are used to calculate the current I input to the desalination three-way regulating valve 9. d The second control module is also used to control the current I. d Input the desalination three-way regulating valve 9.

[0037] This system primarily relies on an electrically operated three-way regulating valve to adjust the water flow ratio entering the resin exchanger, effectively reducing the condensate flow rate entering the resin exchanger and ensuring that the water quality exiting the water treatment system meets the requirements. When the water quality meets the standards, no further water treatment is necessary. When the water quality does not meet the standards, the water treatment and control principles are as follows:

[0038] When O3 > O, it is necessary to adjust O4 to be less than O, which can be achieved using the following principle. Condensate is diverted, with a portion passing through a deoxygenation exchange column to obtain deoxygenated water with dissolved oxygen of O6. Based on the principle of the deoxygenation resin exchanger 10 and experimental data, when the deoxygenation resin is not ineffective, O6 is a stable value that does not change significantly with flow rate, temperature, etc., and can be considered a constant value within a certain time range. The deoxygenated water is mixed with the condensate (dissolved oxygen of O3) that has not passed through the deoxygenation resin exchanger 10 in the pipeline to obtain water with dissolved oxygen of O. The ratio of the water flow rate entering the deoxygenation resin exchanger 10 to the total condensate flow rate is B. o ,have:

[0039]

[0040] To compensate for O4 fluctuations, B can be used. o Adaptive compensation is performed based on the parameter (O4 / O), with the specific compensation function k. o It can be determined by PID algorithm or neural network algorithm, and we can obtain:

[0041]

[0042] That is, B o =f o (O3,O6,O4,O).

[0043] Then, based on the input current adjustment function g of the deaerator three-way regulating valve 8, determine the current input to the deaerator three-way regulating valve 8:

[0044] I o =g(B o ,N)

[0045] This allows for adaptive adjustment of dissolved oxygen in the water supply.

[0046] When D4 > D, D5 needs to be adjusted to be less than D. This can be achieved using the following principle: Convert each conductivity parameter to its corresponding ion concentration parameter using the conductivity-ion concentration conversion function h.

[0047] Y4 = h(D4)

[0048] Y7 = h(D7)

[0049] Y5 = h(D5)

[0050] Y = h(D)

[0051] By diverting deoxygenated water and partially passing it through a desalination exchange column, demineralized water with an ion concentration of Y7 is obtained. Based on the principle of the desalination resin exchanger 11 and experimental data, Y7 is a stable value when the desalination resin is not ineffective, and it does not change significantly with flow rate, temperature, etc., and can be considered a constant value within a certain time range. The demineralized water is mixed with condensate (with an ion concentration of Y3) that has not passed through the desalination exchanger in the pipeline to obtain water with an ion concentration of Y. The ratio of the water flow rate entering the desalination resin exchanger 11 to the total condensate flow rate is B. d ,have:

[0052]

[0053] To compensate for the fluctuations in Y5, B can be used. d Adaptive compensation is performed based on the parameter (Y5 / Y), with the specific compensation function k. d It can be determined by PID or neural network algorithms, and we can obtain:

[0054]

[0055] That is, B d =f d (Y4,Y7,Y5,Y).

[0056] Then, based on the input current adjustment function g of the desalination three-way regulating valve 9, determine the current input to the desalination three-way regulating valve 9:

[0057] I o =g(B d ,N)

[0058] This allows for adaptive adjustment of the water supply conductivity.

[0059] The system process is as follows:

[0060] Condensate enters the marine low-resin consumption water treatment system from condensate inlet 1 at a flow rate N. A small sample of water passes through the condensate water quality monitoring port to the condensate dissolved oxygen sensor, where the dissolved oxygen (O3) is measured. The condensate is then diverted through the deoxygenation three-way regulating valve 8 to the deoxygenation resin exchanger 10 and its bypass pipe. The deoxygenated water flowing out of the deoxygenation resin exchanger 10 passes through the deoxygenated water quality monitoring port 6 to the deoxygenated dissolved oxygen sensor, where the deoxygenated dissolved oxygen (O6) is measured. The water flow from the deoxygenation resin exchanger bypass pipe mixes with the deoxygenated water flow from the deoxygenation resin exchanger 10 and flows to the desalination resin exchanger 11. A small amount of sample water is fed through the desalination inlet water quality monitoring port 4 to the desalination inlet dissolved oxygen and conductivity sensor, where the dissolved oxygen (O4) and conductivity (D4) are measured. The condensate is diverted through the desalination three-way regulating valve 9 to the desalination resin exchanger 11 and its bypass pipe. The desalinated water flowing out of the desalination resin exchanger 11 is fed through the desalination post-water quality monitoring port 7 to the desalination post-conductivity sensor, where the desalination post-conductivity (D7) is measured. The water flow from the desalination resin exchanger bypass pipe mixes with the desalinated water flow from the desalination resin exchanger 11 to form feedwater. A portion of the feedwater sample is fed through the feedwater quality monitoring port to the feedwater conductivity sensor, where the feedwater conductivity (D5) is measured. The feedwater flows out of the water treatment system through the feedwater outlet 2.

[0061] Its control flowchart is shown below. Figure 2 , Figure 3 The control method is as follows:

[0062] 1. Deoxygenation control

[0063] a) When O3 ≤ O, the dissolved oxygen in the condensate has met the water supply requirements. At this time, the current input to the deaeration three-way regulating valve 8 is I. o =4mA, ensuring all water flows through the bypass pipe of the deoxygenation exchange column to avoid consumption of the deoxygenation resin;

[0064] b) When O3 > O, the dissolved oxygen in the condensate does not meet the water supply requirements. In this case, based on the parameters of O3, O6, and O4, and combined with the O parameter, the dissolved oxygen control function f is used. oThe process yields the ratio B of the water flow rate that should enter the deaerator to the total condensate flow rate. o Based on the input current adjustment function g of the deaerator three-way regulating valve 8 and the water flow velocity N, the input current I of the deaerator three-way regulating valve 8 is determined. o The deoxygenation three-way regulating valve 8 is used to divert condensate with excessive dissolved oxygen, so that O4≈O.

[0065] 2. Desalination control

[0066] a) When D4≤D, the conductivity of the condensate has met the requirements of the water supply index. At this time, the current input to the desalination three-way regulating valve 9 is I. d =4mA, ensuring all water flows through the bypass pipe of the desalination exchange column to avoid desalination resin consumption;

[0067] b) When D4 > D, the conductivity of the condensate does not meet the water supply index requirements. In this case, based on the parameters D4, D7, and D5, the conductivity-ion concentration conversion function h is used to obtain the parameters Y4, Y7, and Y5. Then, combined with the Y parameter, the conductivity control function f is used... d The process yields the ratio B of the flow rate that should enter the demineralized resin exchanger 11 to the total condensate flow rate. d Based on the input current adjustment function g of the desalination three-way regulating valve 9 and the water flow velocity N, the input current I of the desalination three-way regulating valve 9 is determined. d The deoxygenation three-way regulating valve 8 is used to divert condensate with excessive dissolved oxygen, so that Y5≈Y.

[0068] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0069] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A marine water treatment system with low resin consumption, characterized in that, It includes: Water treatment device, comprising: Deoxygenated resin exchanger (10); The deoxygenation three-way regulating valve (8) has an A port, a B port and a C port, wherein the A port is connected to the condensate inlet (1) and the B port is connected to the inlet of the deoxygenation resin exchanger (10); Desalination resin exchanger (11); The desalination three-way regulating valve (9) has a D port, an E port and an F port. The D port is connected to both the C port and the outlet of the deoxygenating resin exchanger (10). The E port is connected to the inlet of the desalination resin exchanger (11). The F port and the outlet of the desalination resin exchanger (11) are both connected to the water supply outlet (2). The first control module is used to control the condensate to enter through port A of the deoxygenation three-way regulating valve (8), and part of it flows into the deoxygenation resin exchanger (10) through port B for deoxygenation, while the other part flows out through port C. The second control module is used to control the deoxygenated water flowing out of the deoxygenated resin exchanger (10) and the C port to enter through the D port of the desalination three-way regulating valve (9), and part of it flows into the desalination resin exchanger (11) through the E port for desalination, and the other part flows out through the F port. The pipe connecting port A and the condensate inlet (1) is provided with a condensate water quality monitoring port (3), and the pipe connecting port D and the deoxygenated resin exchanger (10) is provided with a deoxygenated water quality monitoring port (6). The water treatment system also includes a first calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenation resin exchanger (10) from the deoxygenation three-way regulating valve (8) to the total flow rate N of the condensate, based on the dissolved oxygen O3 measured by the condensate water quality monitoring port (3), the dissolved oxygen O6 measured by the deoxygenated water quality monitoring port (6), and the dissolved oxygen O required for the feed water quality. o ; The first control module is also used when the first calculation module calculates the ratio B of the flow rate entering the deaerator resin exchanger (10) from the deaerator three-way regulating valve (8) to the total condensate flow rate N. o Then, according to the stated ratio B o Control the flow rate entering the deoxygenated resin exchanger (10); The branch pipes of the C port and the deoxygenated resin exchanger (10) converge into the main pipe and are connected to the D port. The main pipe is provided with a desalination inlet water quality monitoring port (4); the connecting pipe between the desalination resin exchanger (11) and the water supply outlet (2) is provided with a desalination water quality monitoring port (7). The water treatment system also includes a third calculation module, which is used to calculate the ratio B of the flow rate entering the desalination resin exchanger (11) from the desalination inlet water quality monitoring port (4) to the total condensate flow rate N, based on the desalination inlet conductivity D4 measured by the desalination inlet water quality monitoring port (7), the desalination post-concentration conductivity D7 measured by the desalination post-concentration water quality monitoring port (7), and the required conductivity D of the feed water quality. d ; The second control module is also used when the third calculation module calculates the ratio B of the flow rate entering the desalination resin exchanger (11) from the desalination three-way regulating valve (9) to the total condensate flow rate N. d Then, according to the stated ratio B d The flow rate entering the desalination resin exchanger (11) is controlled.

2. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The connecting pipe between port A and condensate inlet (1) is equipped with a condensate water quality monitoring port (3); The connection pipe between port D and the deoxygenated resin exchanger (10) is provided with a deoxygenated water quality monitoring port (6).

3. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The branch pipes of the C port and the deoxygenated resin exchanger (10) converge into the main pipe and are connected to the D port. The main pipe is equipped with a desalination inlet water quality monitoring port (4). The desalination resin exchanger (11) and the water supply outlet (2) are connected by a water quality monitoring port (7) after desalination.

4. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The connecting pipe between port A and condensate inlet (1) is equipped with a condensate water quality monitoring port (3); The water treatment system further includes a first judgment module, which is signal-connected to the first control module. The first judgment module is used to judge whether the dissolved oxygen O3 content of the condensate measured by the condensate water quality monitoring port (3) is greater than the dissolved oxygen O content required by the water supply quality. The first control module is also used to control the condensate to enter through port A of the deoxygenation three-way regulating valve (8) when the first judgment module determines that the content of dissolved oxygen O3 in the condensate is greater than the content of dissolved oxygen O required by the water quality of the feed water; otherwise, it controls the condensate to flow through the bypass pipe of the deoxygenation exchange column.

5. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The water treatment system further includes a second calculation module, which is used to calculate the ratio B of the flow rate entering the deoxygenated resin exchanger (10) to the total condensate flow rate N. o Calculate the input current I of the deaerator three-way regulating valve (8) based on the input current regulation function g and the total condensate flow N. o ; The first control module is also used to control the current I. o Input the deoxygenation three-way regulating valve (8).

6. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The branch pipes of the C port and the deoxygenated resin exchanger (10) converge into the main pipe and are connected to the D port. The main pipe is equipped with a desalination inlet water quality monitoring port (4). The water treatment system also includes a second judgment module, which is used to determine whether the desalination inlet conductivity D4 measured by the desalination inlet water quality monitoring port (4) is greater than the required conductivity D of the water supply. The second control module is also used to control the deoxygenated water to enter through port D of the deoxygenated three-way regulating valve (9) when the second judgment module determines that the conductivity D4 of the desalination inlet is greater than the conductivity D required for the water quality of the feed water; otherwise, it controls the deoxygenated water to flow through the bypass pipe of the desalination exchange column.

7. The marine low-resin-consumption water treatment system as described in claim 1, characterized in that: The water treatment system further includes a fourth calculation module, which is used to calculate the ratio B of the flow rate entering the desalination resin exchanger (11) to the total condensate flow rate N. d Calculate the input current I of the desalination three-way regulating valve (9) based on the input current regulation function g and the total condensate flow rate N. d ; The second control module is also used to control the current I. d Input the desalination three-way regulating valve (9).

Images