A system and method for eliminating water hammer effect of countercurrent regeneration EDI device

Abstract

The present invention discloses a system and method for eliminating the water hammer effect of a countercurrent regeneration EDI device, including a water inlet, a water production inlet, a concentrated water inlet, an extreme water outlet, and a concentrated water outlet. The EDI module can be modularly designed and arranged, and the bottom elevations of the water production mother pipe arch bridge pipeline, the extreme water mother pipe arch bridge pipeline, and the concentrated water outlet mother pipe arch bridge pipeline are higher than the highest point of the EDI device, ensuring that all EDI modules are always in a full water state, avoiding water outages in the modules and sudden changes in water flow due to inertia. The manual diaphragm valve of the water production mother pipe is located on the water production mother pipe in front of the unqualified water production discharge automatic valve and the qualified water production discharge automatic valve, controlling the flow rates of qualified water production and unqualified water production and maintaining consistency, minimizing the possibility of sudden flow rate changes, achieving a voltage stabilizing protection function, and avoiding the influence of the water hammer effect. The configuration method of the system pressure gauge and flow meter is also improved to avoid black box operation and improve the system dataization and visualization level.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and relates to a system and method for eliminating water hammer effect of a countercurrent regeneration EDI device. Background Art

[0002] EDI (Electrodeionization, continuous electrolytic desalination technology) is a process that replaces the traditional mixed bed ion exchange technology to produce ultrapure water. It removes polluting ions in water by organically combining traditional ion exchange resins and electrodialysis technology. It is currently widely used. The EDI module operation mode is mainly countercurrent regeneration and downstream regeneration. The module layout is mostly an integrated layout of multiple rows and multiple units. The countercurrent regeneration EDI module has strict requirements on the pressure of water inlet, concentrated water inlet, and water production. For example, on the water production pipeline, in order to control the water production pressure, the opening of the manual valve of the water production is very small (usually only 10-20%), and the unqualified water production discharge pipe directly enters the ditch. After the equipment is started, the unqualified water production is first discharged directly, which may cause no water flow through the top module during the process; when switching to the qualified water production discharge pipe, the water production pipeline will vibrate violently, water jet noise will occur, the water inlet and water production pressure will instantly increase by 0.03-0.05MPa, the EDI water production branch pipe interface will vibrate violently, and even the EDI module water production end plate will be damaged, causing great economic losses. Judging and analyzing, it is mainly because when the valve for discharging unqualified water and qualified water is switched, the valve is closed too quickly, and the subsequent water flow reaches quickly under the action of inertia, causing local pressure to rise, which in turn produces a destructive effect, which may cause pipeline rupture, equipment damage, etc. In addition, due to the position setting of the manual discharge valve, the discharge of unqualified water is a full-volume large-flow discharge, and the discharge volume of qualified water is relatively reduced. The sudden change of water volume will also cause impact damage to the module plates.

[0003] Solving the water hammer effect problem in the operation of countercurrent regeneration EDI modules and avoiding water shortage in modules to ensure the normal and safe operation of the system has always occupied an important position in the field of high-purity water preparation. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a system and method for eliminating the water hammer effect of a countercurrent regeneration EDI device which is easy to operate, safe, stable and economical.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A water hammer effect elimination system for a countercurrent regeneration EDI device, comprising:

[0007] A countercurrent regeneration EDI device array, wherein the countercurrent regeneration EDI device array is composed of a plurality of countercurrent regeneration EDI modules arranged in an array;

[0008] A water inlet pipeline, wherein the water inlet pipeline includes a main water inlet pipe and a plurality of water inlet branch pipes, one end of the main water inlet pipe inputs incoming water, and the other end is connected to one end of the plurality of water inlet branch pipes; the other end of the water inlet branch pipe is connected to the water inlet of the corresponding countercurrent regeneration EDI module;

[0009] A water production pipeline, wherein the water production pipeline includes a water production main pipe and a plurality of water production branch pipes, one end of each water production branch pipe is connected to the water production port of the corresponding countercurrent regeneration EDI module, and the other end is connected to the water production main pipe, and the other end of the water production main pipe is provided with an unqualified water discharge port and a qualified water discharge port;

[0010] A concentrate water inlet pipeline, wherein the concentrate water inlet pipeline comprises a concentrate water inlet main pipe and a plurality of concentrate water inlet branch pipes, one end of the concentrate water inlet main pipe is connected to the water inlet main pipe, and the other end is connected to one end of the plurality of concentrate water inlet branch pipes; the other end of the concentrate water inlet branch pipe is connected to the concentrate water inlet of the corresponding countercurrent regeneration EDI module;

[0011] The extreme water pipeline includes an extreme water main pipe and a plurality of extreme water branch pipes, one end of each extreme water branch pipe is connected to the extreme water outlet of the corresponding countercurrent regeneration EDI module, and the other end is connected to the extreme water main pipe; the end of the extreme water main pipe is an extreme water discharge port;

[0012] The concentrate outlet pipeline includes a concentrate outlet main pipe and a plurality of concentrate outlet branch pipes, one end of each concentrate outlet branch pipe is connected to the concentrate outlet of the corresponding countercurrent regeneration EDI module, and the other end is connected to the concentrate outlet main pipe; the end of the concentrate outlet main pipe is a concentrate discharge port.

[0013] The present invention is further improved in that:

[0014] The water inlet main pipe is provided with a water inlet main pipe flow meter and a water inlet main pipe pressure gauge, both of which can display the current flow and pressure of the water inlet main pipe and can remotely feedback monitoring data; in the array-arranged countercurrent regeneration EDI modules, each row of water inlet branch pipes is provided with a single row of water inlet branch pipe pressure gauges.

[0015] In the countercurrent regeneration EDI modules arranged in an array, a single row of water production branch pipes is provided on each row of water production branch pipes, and a water production mother pipe pressure gauge, a water production mother pipe manual diaphragm valve and a water production mother pipe flow meter are sequentially arranged on the water production mother pipe along the water production flow direction. An unqualified water production automatic discharge valve is provided at the unqualified water discharge outlet at the end of the water production mother pipe, and a qualified water production automatic discharge valve is provided at the qualified water discharge outlet.

[0016] A water-producing mother pipe arch bridge pipeline with a pipeline bottom elevation higher than the highest point of the EDI device is arranged between the water-producing mother pipe flow meter and the unqualified water discharge outlet and the qualified water discharge outlet.

[0017] A manual concentrated water inlet diaphragm valve, a concentrated water inlet pressure reducing valve and a concentrated water inlet pressure gauge are sequentially arranged on the concentrated water inlet main pipe along the concentrated water inlet flow direction; the concentrated water inlet pressure gauge can display the current pressure of the concentrated water inlet main pipe and can remotely feedback monitoring data.

[0018] In the array-arranged countercurrent regeneration EDI module, a single row of extreme water branch pipes is provided on each row of extreme water branch pipes, and an extreme water main pipe pressure gauge, an extreme water main pipe manual diaphragm valve and an extreme water main pipe flow meter are sequentially provided on the extreme water main pipe along the extreme water flow direction.

[0019] A polar water dam arch bridge pipeline with a pipeline bottom elevation higher than the highest point of the EDI device is arranged between the polar water dam flow meter and the polar water discharge port.

[0020] In the countercurrent regeneration EDI modules arranged in an array, each row of concentrate outlet branch pipes is provided with a single row of concentrate outlet branch pipe pressure gauges, and the concentrate outlet main pipe is provided with a concentrate outlet main pipe pressure gauge, a concentrate outlet main pipe manual diaphragm valve and a concentrate outlet main pipe flow meter in sequence along the concentrate outlet water flow direction.

[0021] A concentrate outlet main pipe arch bridge pipeline with a pipeline bottom elevation higher than the highest point of the EDI device is arranged between the concentrate outlet main pipe flow meter and the concentrate discharge port.

[0022] A method for eliminating water hammer effect of a countercurrent regeneration EDI device comprises the following steps:

[0023] When starting the EDI device:

[0024] Open the automatic valve for discharging unqualified produced water, and adjust the opening of the manual diaphragm valve of the produced water main pipe to make the discharge flow rate consistent with the final qualified produced water flow rate;

[0025] When the quality of produced water reaches the set requirements, the automatic valve for discharging qualified produced water is opened;

[0026] After all the automatic valves for discharging qualified produced water are opened, close the automatic valves for discharging unqualified produced water;

[0027] When shutting down the EDI device:

[0028] Open the automatic valve for discharging unqualified produced water;

[0029] After all the automatic valves for discharging unqualified produced water are opened, close the automatic valves for discharging qualified produced water;

[0030] After flushing is completed, close the automatic valve for discharging unqualified water.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention improves the operation mode of the countercurrent regeneration EDI device by setting up arched outlet pipes for produced water, extreme water and concentrated water, adjusting the valve arrangement, and the configuration of the pressure gauge and flow meter, thereby solving the adverse effects of the water hammer effect and improving the safety and stability of the system.

[0033] The outlet water is stable with little fluctuation. By setting up arched pipes for the outlet water, extreme water and concentrated water, the arch bridge elevation is higher than the top height of the highest EDI device module, which effectively ensures that all modules are always full of water, and the outlet water is effectively buffered by the arched pipe, and the outlet water pressure is stable.

[0034] The water production channels are controllable and unified. By adjusting the valve arrangement and the arch-shaped pipe setting, the flow rates of unqualified and qualified water production are the same, which minimizes the possibility of sudden flow changes, achieves a pressure stabilizing protection function, and avoids the influence of water hammer effect.

[0035] Visualize the operation, add pressure gauges, flow meters and other instruments, deeply control the system operating conditions, avoid black box operation, and improve the system's data and visualization level. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the structure of the system of the present invention.

[0038] Among them, 1- countercurrent regeneration EDI module, 2- water inlet, 21- water inlet main pipe flow meter, 22- water inlet main pipe pressure gauge, 23- single row water inlet branch pipe pressure gauge, 3- water production port, 31- single row water production branch pipe pressure gauge, 32- water production main pipe pressure gauge, 33- water production main pipe manual diaphragm valve, 34- water production main pipe flow meter, 35- water production main pipe arch bridge pipeline, 36- unqualified water production automatic valve, 37- qualified water production automatic valve, 4- concentrated water inlet, 41- concentrated water inlet Water manual diaphragm valve, 42-concentrate water inlet pressure reducing valve, 43-concentrate water inlet pressure gauge, 5-polar water outlet, 51-single-row polar water pressure gauge, 52-polar water jellyfish pipe pressure gauge, 53-polar water jellyfish pipe manual diaphragm valve, 54-polar water jellyfish pipe flowmeter, 55-polar water jellyfish pipe arch bridge pipeline, 6-concentrate water outlet, 61-single-row concentrate water outlet pressure gauge, 62-concentrate water outlet jellyfish pipe pressure gauge, 63-concentrate water outlet jellyfish pipe manual diaphragm valve, 64-concentrate water outlet jellyfish pipe flowmeter, 65-concentrate water outlet jellyfish pipe arch bridge pipeline. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0046] The present invention solves the adverse effects of the water hammer effect and improves the safety and stability of the system by setting up arched bridge-shaped outlet pipes for produced water, extreme water and concentrated water, improving the configuration of valves, pressure gauges and flow meters, and improving the operation mode of the countercurrent regeneration EDI device.

[0047] See also Figure 1 An embodiment of the present invention discloses a water hammer effect elimination system of a countercurrent regeneration EDI device, including a countercurrent regeneration EDI module 1, wherein the countercurrent regeneration EDI module 1 includes a water inlet 2, a water production inlet 3, a concentrate water inlet 4, an extreme water outlet 5 and a concentrate water outlet 6.

[0048] The countercurrent regeneration EDI modules 1 are arranged in multiple rows (m rows) vertically, with n modules in each row. The module is modularly designed, and the number of modules can be flexibly adjusted according to the output of a single module, the total output of the system, the size of the space, etc., and m and n are both natural numbers.

[0049] A water inlet branch pipe and a water inlet main pipe are connected in front of the water inlet 2. A single row of water inlet branch pipe pressure gauges 23 are arranged on the water inlet branch pipes of each row of EDI modules. A water inlet main pipe flow meter 21 and a water inlet main pipe pressure gauge 22 are arranged on the water inlet main pipe. The water inlet main pipe flow meter 21 and the water inlet main pipe pressure gauge 22 have local and remote display functions.

[0050] The water outlet 3 is connected to a water production branch pipe and a water production mother pipe. A single-row water production branch pipe pressure gauge 31 is set on each row of EDI module water production branch pipes, and a water production mother pipe pressure gauge 32, a water production mother pipe manual diaphragm valve 33, and a water production mother pipe flow meter 34 are set on the water production mother pipe, and a water production mother pipe arch bridge pipe 35 with a pipeline bottom elevation higher than the highest point of the EDI device is set. The water production mother pipe manual diaphragm valve 33 is located on the water production mother pipe in front of the water production mother pipe arch bridge pipe 35, so as to control the flow of qualified water production and unqualified water production and maintain consistency. The water production mother pipe pressure gauge 32 and the water production mother pipe flow meter 34 have local and remote display functions. The unqualified water production automatic valve 36 and the qualified water production automatic valve 37 are connected to the water production mother pipe arch bridge pipe 35 respectively to discharge the unqualified water production in the initial operation into the subsequent system. The switching of the two valves depends on the setting requirements of the water production quality, and the two valves must exclude the possibility of simultaneous and instantaneous closure.

[0051] The concentrate water inlet 4 is connected to a concentrate water inlet manual diaphragm valve 41, a concentrate water inlet pressure reducing valve 42, and a concentrate water inlet pressure gauge 43. The concentrate water inlet direction is countercurrent to the fresh water production direction to prevent scaling in the module to the greatest extent. The concentrate water inlet pressure gauge 43 has local and remote display functions. By adjusting the opening of the concentrate water inlet manual diaphragm valve 41 and the concentrate water inlet pressure reducing valve 42, the concentrate water inlet flow and pressure are adjusted to meet the requirements.

[0052] The extreme water outlet 5 is connected to an extreme water branch pipe and an extreme water dam pipe. A single row of extreme water pressure gauges 51 are arranged on the extreme water branch pipes of each row of EDI modules. The extreme water dam pipe is provided with an extreme water dam pipe pressure gauge 52, an extreme water dam pipe manual diaphragm valve 53, and an extreme water dam pipe flow meter 54. An extreme water dam pipe arch bridge pipe 55 is arranged with a pipeline bottom elevation higher than the highest point of the EDI device, and the extreme water is discharged or recycled. The extreme water dam pipe pressure gauge 52 and the extreme water dam pipe flow meter 54 have local and remote display functions.

[0053] The concentrate outlet 6 is connected to a concentrate outlet branch pipe and a concentrate outlet main pipe. A single row of concentrate outlet pressure gauges 61 are provided on each row of EDI module concentrate outlet branch pipes. A concentrate outlet main pipe pressure gauge 62, a concentrate outlet main pipe manual diaphragm valve 63, and a concentrate outlet main pipe flow meter 64 are provided on the concentrate outlet main pipe. A concentrate outlet main pipe arch bridge pipe 65 with a pipeline bottom elevation higher than the highest point of the EDI device is provided to discharge or recycle the concentrate. The concentrate outlet main pipe pressure gauge 62 and the concentrate outlet main pipe flow meter 64 have local and remote display functions.

[0054] Principle of the present invention:

[0055] See also Figure 1 As shown, the influent enters different rows of countercurrent regeneration EDI modules 1 with a certain pressure requirement. The countercurrent regeneration EDI modules 1 are arranged in m rows with n modules in each row, where m and n are both natural numbers. The influent enters the ion exchange chamber, and direct current is used to force the polluted ions to continuously migrate out of the influent, and pass through the ion bed and ion exchange membrane into the concentrated water chamber. Direct current can ionize water molecules into hydrogen ions and hydroxide ions, and continuously regenerate the resin. At the same time, the opening of the concentrated influent manual diaphragm valve 41 and the concentrated influent pressure reducing valve 42 are adjusted to meet the concentrated influent flow and pressure requirements. The concentrated influent and produced water directions are countercurrent, which greatly shortens the Ca 2+ Mg 2+ The residence time of scale-causing ions in the concentrated water chamber is shortened to prevent scaling in the module to the greatest extent. The outlet pipes of the produced water, concentrated water, and extreme water of the EDI device are all equipped with a mother pipe arch bridge pipe with a pipeline bottom elevation higher than the highest point of the EDI device to ensure that all countercurrent regeneration EDI modules 1 are always full of water, and manual diaphragm valves are installed on the outlet pipes of the produced water, concentrated water, and extreme water to control the flow and adjust the system recovery rate.

[0056] The water inlet main pipe flowmeter 21, the water production main pipe flowmeter 34, the extreme water main pipe flowmeter 54, and the concentrate outlet water main pipe flowmeter 64 have local and remote display functions, and the water inlet main pipe pressure gauge 22, the water production main pipe pressure gauge 32, the concentrate inlet pressure gauge 43, the extreme water main pipe pressure gauge 52, and the concentrate outlet water main pipe pressure gauge 62 have local and remote display functions, thereby enhancing system visibility, monitoring adjustability, and dataization, and ensuring the safe and stable operation of the countercurrent regeneration EDI device.

[0057] Working process of the present invention:

[0058] At the initial start-up of the EDI device, first open the unqualified water production automatic valve 36, and adjust the opening of the manual diaphragm valve 33 of the water production main pipe so that the discharge flow is consistent with the final qualified water production flow. When the water production quality meets the set requirements, such as the water production conductivity, open the qualified water production automatic valve 37, and after all the qualified water production automatic valves 37 are opened, close the unqualified water production automatic valve 36. Similarly, when the EDI device is shut down, open the unqualified water production automatic valve 36, and after all the unqualified water production automatic valves 36 are opened, close the qualified water production automatic valve 37. After flushing for a period of time, close the unqualified water production automatic valve 36.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water hammer effect elimination system for a countercurrent regeneration EDI device, characterized in that: include: A countercurrent regeneration EDI device array, wherein the countercurrent regeneration EDI device array is composed of a plurality of countercurrent regeneration EDI modules (1) arranged in an array; A water inlet pipeline, the water inlet pipeline comprising a main water inlet pipe and a plurality of water inlet branch pipes, one end of the main water inlet pipe inputting incoming water, and the other end of the main water inlet pipe connected to one end of the plurality of water inlet branch pipes; the other end of the water inlet branch pipe is connected to a water inlet (2) of a corresponding countercurrent regeneration EDI module (1); A water production pipeline, the water production pipeline comprising a water production main pipe and a plurality of water production branch pipes, one end of each water production branch pipe being connected to a water production port (3) of a corresponding countercurrent regeneration EDI module (1), and the other end being connected to the water production main pipe, and the other end of the water production main pipe being provided with an unqualified water discharge port and a qualified water discharge port; A concentrate water inlet pipeline, the concentrate water inlet pipeline comprising a concentrate water inlet main pipe and a plurality of concentrate water inlet branch pipes, one end of the concentrate water inlet main pipe being connected to the water inlet main pipe, and the other end of the concentrate water inlet branch pipe being connected to one end of the plurality of concentrate water inlet branch pipes; the other end of the concentrate water inlet branch pipe being connected to a concentrate water inlet (4) of a corresponding countercurrent regeneration EDI module (1); An extreme water pipeline, the extreme water pipeline comprising an extreme water main pipe and a plurality of extreme water branch pipes, one end of each extreme water branch pipe being connected to an extreme water outlet (5) of a corresponding countercurrent regeneration EDI module (1), and the other end being connected to the extreme water main pipe; the end of the extreme water main pipe being an extreme water discharge port; A concentrate outlet pipeline, the concentrate outlet pipeline comprising a concentrate outlet main pipe and a plurality of concentrate outlet branch pipes, one end of each concentrate outlet branch pipe being connected to a concentrate outlet (6) of a corresponding countercurrent regeneration EDI module (1), and the other end being connected to the concentrate outlet main pipe; the end of the concentrate outlet main pipe is a concentrate discharge port; In the countercurrent regeneration EDI module (1) arranged in an array, a single row of water production branch pipe pressure gauges (31) are provided on each row of water production branch pipes; a water production mother pipe pressure gauge (32), a water production mother pipe manual diaphragm valve (33) and a water production mother pipe flow meter (34) are provided in sequence on the water production mother pipe along the water production flow direction; an unqualified water production automatic discharge valve (36) is provided at the unqualified water discharge outlet at the end of the water production mother pipe, and an qualified water production automatic discharge valve (37) is provided at the qualified water discharge outlet; a water production mother pipe arch bridge pipe (35) having a pipeline bottom elevation higher than the highest point of the EDI device is provided between the water production mother pipe flow meter (34) and the unqualified water discharge outlet and the qualified water discharge outlet; in the countercurrent regeneration EDI module (1) arranged in an array, each A single row of extreme water branch pipe pressure gauges (51) are provided on the extreme water discharge branch pipe, and an extreme water mother pipe pressure gauge (52), an extreme water mother pipe manual diaphragm valve (53) and an extreme water mother pipe flow meter (54) are sequentially provided on the extreme water mother pipe along the extreme water flow direction; in the array-arranged countercurrent regeneration EDI module (1), a single row of concentrate outlet water branch pipe pressure gauges (61) are provided on each row of concentrate outlet water branch pipes, and a concentrate outlet water mother pipe pressure gauge (62), a concentrate outlet water mother pipe manual diaphragm valve (63) and a concentrate outlet water mother pipe flow meter (64) are sequentially provided on the concentrate outlet water mother pipe along the concentrate outlet water flow direction; a concentrate outlet water mother pipe arch bridge pipe (65) having a pipeline bottom elevation higher than the highest point of the EDI device is provided between the concentrate outlet water mother pipe flow meter (64) and the concentrate water discharge port; An extreme water dam pipe arch bridge pipeline (55) having a pipeline bottom elevation higher than the highest point of the EDI device is provided between the extreme water dam pipe flow meter (54) and the extreme water discharge port.

2. The water hammer effect elimination system of the countercurrent regeneration EDI device according to claim 1 is characterized in that: The water inlet main pipe is provided with a water inlet main pipe flow meter (21) and a water inlet main pipe pressure gauge (22), and the water inlet main pipe flow meter (21) and the water inlet main pipe pressure gauge (22) are both capable of displaying the current flow rate and pressure of the water inlet main pipe and are capable of remotely feeding back monitoring data; In the countercurrent regeneration EDI modules (1) arranged in an array, each row of water inlet branch pipes is provided with a single row of water inlet branch pipe pressure gauges (23).

3. The water hammer effect elimination system of the countercurrent regeneration EDI device according to claim 1 is characterized in that: A concentrated water inlet manual diaphragm valve (41), a concentrated water inlet pressure reducing valve (42) and a concentrated water inlet pressure gauge (43) are sequentially arranged on the concentrated water inlet main pipe along the concentrated water inlet flow direction; the concentrated water inlet pressure gauge (43) can display the current pressure of the concentrated water inlet main pipe and can remotely feedback monitoring data.

4. A method for eliminating water hammer effect using the water hammer effect elimination system of the countercurrent regeneration EDI device according to any one of claims 1 to 3, characterized in that: The following steps are involved: When starting the EDI device: Open the unqualified produced water discharge automatic valve (36), and adjust the opening of the produced water main pipe manual diaphragm valve (33) so that the discharge flow rate is consistent with the final qualified produced water flow rate; When the quality of produced water reaches the set requirements, the qualified produced water discharge automatic valve (37) is opened; After all the qualified produced water discharge automatic valves (37) are opened, the unqualified produced water discharge automatic valves (36) are closed; When shutting down the EDI device: Opening the automatic valve (36) for discharging unqualified produced water; After all the unqualified produced water discharge automatic valves (36) are opened, the qualified produced water discharge automatic valves (37) are closed; After flushing is completed, close the automatic valve (36) for discharging unqualified produced water.

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