Stable-operation demineralized water system

Abstract

The utility model relates to the technical field of demineralized water systems, which is characterized in that a demineralized water tank B is arranged on one side of a demineralized water tank A, and one side of each of the demineralized water tank A and the demineralized water tank B is connected with a conveying pipe; one side of the conveying pipe is sequentially connected with a normal make-up pump A, a normal make-up pump B, a frequency conversion all-in-one machine starting make-up pump A and a frequency conversion all-in-one machine starting make-up pump B in series, and the other end of the normal make-up pump A, the other end of the normal make-up pump B, the other end of the frequency conversion all-in-one machine starting make-up pump A and the other end of the frequency conversion all-in-one machine starting make-up pump B are connected with a flushing water pump inlet. A frequency conversion all-in-one machine starting make-up pump A and a frequency conversion all-in-one machine starting make-up pump B are used for replacing an original power frequency starting make-up pump, the relation between the unit and the desalted water supplementing flow and pressure during starting and under various load states is balanced through the frequency conversion technology, meanwhile, the water pressure and the water flow can be stabilized, the operation stability of a desalted water system is improved, and the service life of the desalted water system is prolonged. And safe operation of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of desalted water systems, in particular to a stably operated desalted water system. Background Art

[0002] The current desalted water system is equipped with two low-power normal feed water pumps with frequency conversion (about 22kW) and two high-power starting feed water pumps without frequency conversion (about 132kW). The four pumps are connected in parallel to the same desalted water feed water main pipe to jointly replenish desalted water for the unit. Under normal operating conditions of the unit, the two normal feed water pumps can meet the desalted water feed water demand. However, when the unit is started, the demand for desalted water increases significantly, and the feed water pumps need to be started for water replenishment. When both normal feed water pumps reach the upper limit of output and the outlet pressure is still low, a starting feed water pump is linked to maintain the outlet pressure, and the normal feed water pump is stopped at the same time. When the outlet pressure recovers and the flow demand is low, the normal feed water pump is switched to operation.

[0003] However, due to the large power of the starting water supply pump, the desalted water flow and pressure quickly reach the upper limit after startup and the pump stops. Therefore, each time the machine is started, the starting water supply pump starts and stops at least 20 to 30 times, and at most even 70 to 80 times. The rated current of the starting water supply pump is 235.7A, and the starting current of the motor is generally 4-8 times the rated current. Due to the frequent starts and stops, the starting water supply pump motor and its switch have failed many times. Moreover, each time the starting water supply pump is started, a transient overvoltage will occur, which will cause multiple impacts on the desalted water pipeline, endangering the safety of the equipment and being detrimental to the safe operation of the unit. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the deficiencies in the prior art, the present invention provides a stably operating desalted water system, which solves the problem that the starting water supply pump has a large power, and the desalted water flow and pressure quickly reach the upper limit value after startup and the pump stops. Therefore, each time the machine is started, the starting water supply pump starts and stops at least twenty to thirty times, and at most even seventy to eighty times. The rated current of the starting water supply pump is 235.7A, and the starting current of the motor is generally 4-8 times the rated current. Due to the frequent and large number of starts and stops, the starting water supply pump motor and its switch have failed many times. Moreover, each time the starting water supply pump is started, a transient overvoltage will occur, which will repeatedly impact the desalted water pipeline, endangering the safety of the equipment and being detrimental to the safe operation of the unit.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stably operating desalted water system, comprising a desalted water tank A and a desalted water tank B, a desalted water tank B being provided on one side of the desalted water tank A, and a delivery pipe being connected to one side of the desalted water tank A and the desalted water tank B, one side of the delivery pipe being connected in series with a normal water supply pump A, a normal water supply pump B, a frequency conversion all-in-one starting water supply pump A and a frequency conversion all-in-one starting water supply pump B, one end of the normal water supply pump A, the normal water supply pump B, the frequency conversion all-in-one starting water supply pump A and the frequency conversion all-in-one starting water supply pump B away from the delivery pipe is respectively connected to a water inlet pipe of a cleaning water tank, a water pipe for a laboratory and a connecting pipe for a main machine room through a collecting pipe, and the other ends of the normal water supply pump A, the normal water supply pump B, the frequency conversion all-in-one starting water supply pump A and the frequency conversion all-in-one starting water supply pump B are connected to an inlet of a flushing water pump;

[0008] The outer sides of the desalted water tank A and the desalted water tank B are both sleeved with outer sleeves, and the side ends of the outer sleeves are fixedly connected with four groups of connecting threaded rods, and the tops of the connecting threaded rods are connected with a top cover through nut seats, and the middle part of the bottom end of the top cover is fixedly connected with an air collecting hood, and the side ends of the air collecting hood are evenly provided with air inlet slots, and the inner side of the air collecting hood is rotatably connected with fan blades, and the bottom air outlet end of the air collecting hood is connected with an air collecting box, and the bottom side ends of the air collecting box are connected with multiple groups of air distribution ducts at equal angles, and the bottom side ends of the outer sleeve are evenly provided with exhaust slots.

[0009] As an optimal technical solution for a stably operating desalted water system of the utility model, the A frequency conversion all-in-one machine-started water supply pump and the B frequency conversion all-in-one machine-started water supply pump replace the original industrial frequency-started water supply pump, and both the A frequency conversion all-in-one machine-started water supply pump and the B frequency conversion all-in-one machine-started water supply pump are driven by the frequency conversion all-in-one machine.

[0010] As an optimal technical solution for a stably operating desalted water system of the present invention, a cooling chamber is provided between the outer walls of the desalted water tank A and the desalted water tank B and the inner wall of the outer sleeve, and the bottom air outlet end of the air distribution duct extends into the cooling chamber.

[0011] As an optimal technical solution for a stably operating desalted water system of the utility model, a sealing cover is provided at the bottom of the air collecting hood corresponding to the top position of the desalted water tank A and the desalted water tank B. The position of the top cover is adjusted by connecting the threaded rod, and the air collecting hood and the sealing cover are driven by the top cover to cover the top of the desalted water tank A and the desalted water tank B.

[0012] As an optimal technical solution for a stably operating desalted water system of the present invention, the end of the delivery pipe is connected to an installation box, the inner side of the installation box is embedded and connected with an interception box, both side edges of the interception box are bonded with sealing strips, and the bottom of the interception box is embedded and connected with an interception bottom net.

[0013] As an optimal technical solution for a stably operating desalted water system of the present invention, the sealing strip on the edge of the interception box is in close contact with the sliding connection between the interception box and the installation box.

[0014] (3) Beneficial effects

[0015] Compared with the existing technology, the present invention provides a stable desalination system with the following beneficial effects:

[0016] 1. The original power frequency started water supply pump is replaced by the A frequency conversion integrated machine to start the water supply pump and the B frequency conversion integrated machine to start the water supply pump, and both the A frequency conversion integrated machine to start the water supply pump and the B frequency conversion integrated machine to start the water supply pump are driven by the frequency conversion integrated machine. The frequency conversion integrated machine and the water supply pressure realize linear closed-loop control, frequency conversion starting, and real-time power adjustment, avoiding the impact of large current and excessive water pipe pressure when the power frequency motor is started. It effectively solves the problems of frequent opening and closing of the motor switch, large motor starting current, and flow and pressure fluctuations of the desalted water jellyfish pipe, greatly reducing the failure rate of the equipment. The frequency conversion technology is used to balance the relationship between the unit and the desalted water supply flow and pressure at startup and under various load conditions. At the same time, it can stabilize the water pressure and water flow, improve the operating stability of the desalted water system, and ensure the safe operation of the equipment.

[0017] 2. Through the outer sleeve, connecting threaded rod, top cover, air collecting hood, fan blades, air inlet slots, air collecting box, air distribution duct and exhaust slots, during the normal use of desalted water tank A and desalted water tank B, external air can enter the air collecting hood through the air inlet slots, and the external air can drive the fan blades in the air collecting hood to rotate, so that the fan blades generate cooling airflow after rotation, and the air collecting box and air distribution duct can be used to evenly distribute the cooling airflow to the outside of desalted water tank A and desalted water tank B, thereby achieving uniform cooling treatment of desalted water tank A and desalted water tank B, effectively reducing the temperature of the desalted water, and facilitating better use thereof.

[0018] 3. By arranging an installation box, an interception box, a sealing strip, an interception bottom net and an air inlet slot at the end of the conveying pipe, the interception bottom net in the interception box can be used to effectively filter the desalted water before it is transported, thereby intercepting impurities and dirt mixed in the desalted water, ensuring that the desalted water transported subsequently is cleaner. At the same time, the sealing strip ensures the tightness of the connection between the interception box and the installation box, and this method facilitates the overall disassembly of the interception box, thereby facilitating the cleaning of the dirt intercepted inside it, making the cleaning operation more convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a structural diagram of the outer sleeve of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the gas collecting hood of the utility model.

[0022] Figure 4 It is a structural diagram of the installation box of the utility model.

[0023] Figure 5 This is a control logic diagram of the utility model frequency conversion and speed regulation integrated machine.

[0024] In the figure: 1. Desalted water tank A; 2. Desalted water tank B; 3. Delivery pipe; 4. Normal water supply pump A; 5. Normal water supply pump B; 6. Starting water supply pump A for frequency conversion all-in-one machine; 7. Starting water supply pump B for frequency conversion all-in-one machine; 8. Flushing pump inlet; 9. Cleaning water tank inlet pipe; 10. Laboratory water pipe; 11. Main machine room connecting pipe; 12. Outer sleeve; 13. Connecting threaded rod; 14. Top cover; 15. Gas collecting hood; 16. Fan blades; 17. Gas collecting box; 18. Gas distribution duct; 19. Exhaust slot; 20. Installation box; 21. Interception box; 22. Sealing strip; 23. Interception bottom net; 24. Air inlet slot. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0026] See also Figure 1-4The utility model provides the following technical solutions: a stable desalted water system, comprising a desalted water tank A 1 and a desalted water tank B 2, a desalted water tank B 2 being provided on one side of the desalted water tank A 1, and a delivery pipe 3 being connected to one side of the desalted water tank A 1 and the desalted water tank B 2, one side of the delivery pipe 3 being connected in series with a normal water supply pump A 4, a normal water supply pump B 5, a frequency conversion all-in-one machine starting water supply pump A 6 and a frequency conversion all-in-one machine starting water supply pump B 7, the frequency conversion all-in-one machine starting water supply pump A 6 and the frequency conversion all-in-one machine starting water supply pump B 7 replacing the original power frequency starting water supply pump, and the frequency conversion all-in-one machine starting water supply pump A 6 and the frequency conversion all-in-one machine starting water supply pump B 7 both adopt frequency conversion all-in-one machine starting water supply pump A 6 The unit is dragged by a whole machine, and the frequency conversion technology is used to balance the relationship between the desalted water supply flow and pressure when the unit is started and under various load conditions. At the same time, it can stabilize the water pressure and water flow, improve the operational stability of the desalted water system, and ensure the safe operation of the equipment. The ends of A normal water supply pump 4, B normal water supply pump 5, A frequency conversion all-in-one starting water supply pump 6 and B frequency conversion all-in-one starting water supply pump 7 away from the delivery pipe 3 are respectively connected to the cleaning water tank inlet pipe 9, the laboratory water pipe 10, and the main machine room connecting pipe 11 through the collecting pipe. The other ends of A normal water supply pump 4, B normal water supply pump 5, A frequency conversion all-in-one starting water supply pump 6 and B frequency conversion all-in-one starting water supply pump 7 are connected to the flushing water pump inlet 8;

[0027] The outer sides of the desalted water tank A 1 and the desalted water tank B 2 are both sleeved with an outer sleeve 12, and the side ends of the outer sleeve 12 are fixedly connected with four groups of connecting threaded rods 13, and the tops of the connecting threaded rods 13 are limitedly connected with a top cover 14 through a nut seat, and the middle part of the bottom end of the top cover 14 is fixedly connected with an air collecting hood 15, and the bottom of the air collecting hood 15 is provided with a sealing cover corresponding to the top position of the desalted water tank A 1 and the desalted water tank B 2. The top cover 14 adjusts its position by connecting the threaded rods 13, and the air collecting hood 15 and the sealing cover are driven by the top cover 14 to cover the tops of the desalted water tank A 1 and the desalted water tank B 2, so as to facilitate the sealing of the tops of the desalted water tank A 1 and the desalted water tank B 2, and at the same time facilitate the adjustment. At the position of the section top cover 14, air inlet slots 24 are evenly opened on the edge ends of the air collecting hood 15, and the inner side of the air collecting hood 15 is rotatably connected to the fan blades 16, the bottom air outlet end of the air collecting hood 15 is connected to the air collecting box 17, and the bottom edge ends of the air collecting box 17 are connected to multiple groups of air distribution ducts 18 at equal angles, a cooling chamber is provided between the outer walls of the desalted water tank A 1 and the desalted water tank B 2 and the inner wall of the outer sleeve 12, the bottom air outlet end of the air distribution duct 18 extends into the cooling chamber, and the air collecting box 17 and the air distribution duct 18 are used to facilitate the uniform distribution of the cooling airflow to the outside of the desalted water tank A 1 and the desalted water tank B 2, and the bottom edge ends of the outer sleeve 12 are evenly provided with exhaust slots 19.

[0028] The end of the conveying pipe 3 is connected to the installation box 20, and the inner side of the installation box 20 is embedded and connected with an interception box 21. The two side edges of the interception box 21 are bonded with sealing strips 22. The sealing strip 22 on the edge of the interception box 21 is in close contact with the sliding connection between it and the installation box 20. The sealing strip 22 ensures the tightness of the connection between the interception box 21 and the installation box 20, and this method facilitates the overall disassembly of the interception box 21, and the bottom of the interception box 21 is embedded and connected with an interception bottom net 23.

[0029] The working principle and use process of the present invention are as follows: first, the A frequency conversion integrated machine starts the water supply pump 6 and the B frequency conversion integrated machine starts the water supply pump 7 to replace the original industrial frequency started water supply pump in the desalted water system, and the A frequency conversion integrated machine starts the water supply pump 6 and the B frequency conversion integrated machine starts the water supply pump 7. Both the frequency conversion integrated machine and the water supply pressure realize linear closed-loop control, frequency conversion starting, and real-time power adjustment, avoiding the impact of large current and excessive water pipe pressure when starting by the industrial frequency motor, effectively solving the problems of frequent separation and connection of the motor switch, large motor starting current, and fluctuation of the flow and pressure of the desalted water jellyfish pipe, greatly reducing the failure rate of the equipment, and using frequency conversion technology to balance the relationship between the unit and the desalted water supply flow and pressure when starting and under various load conditions, and at the same time stabilize the water pressure and water flow, improve the operational stability of the desalted water system, and ensure the safe operation of the equipment;

[0030] In addition, the electrical system of the variable frequency speed control integrated machine mainly consists of the frequency conversion part and the motor part, among which the frequency conversion part is composed of the main circuit, control circuit, drive circuit, display screen, etc. Figure 5 The motor and the frequency converter are integrated and designed in an all-in-one manner. The system directly controls the all-in-one machine without any intermediate variables, thus saving the power cable from the frequency converter to the motor. The machine can be directly replaced with the original industrial frequency motor, which also saves installation space. The advantages of high control and adjustment accuracy and good adjustment linearity of the frequency converter and the optimized control logic are utilized. The start and stop of the water supply pump are controlled by the internal electronic switch of the frequency converter to achieve soft start of the motor. The motor frequency and the water pump power output are adjusted at any time according to the water supply main pipe pressure, so that the flow rate and pressure of the desalted water remain stable.

[0031] During normal use of the desalted water tank A 1 and the desalted water tank B 2, external air flows into the air collecting cover 15 through the air inlet notch 24, and the fan blades 16 in the air collecting cover 15 are driven by the external air flow to rotate, so that the fan blades 16 generate cooling airflow after the rotation, and the cooling airflow is evenly distributed to the outside of the desalted water tank A 1 and the desalted water tank B 2 by using the air collecting box 17 and the air distribution duct 18, so as to achieve uniform cooling treatment of the desalted water tank A 1 and the desalted water tank B 2, effectively reduce the temperature of the desalted water, and facilitate better use thereof;

[0032] When the desalted water in the desalted water tank A 1 and the desalted water tank B 2 is transported through the transport pipe 3, by arranging the installation box 20, the interception box 21, the sealing strip 22, the interception bottom net 23 and the air inlet notch 24 at the end of the transport pipe 3, the interception bottom net 23 in the interception box 21 can be used to effectively filter the desalted water before it is transported, thereby intercepting impurities and dirt mixed in the desalted water, ensuring that the desalted water transported subsequently is cleaner;

[0033] At the same time, the sealing strip 22 ensures the tightness of the connection between the interception box 21 and the installation box 20, and this method facilitates the overall disassembly of the interception box 21, thereby facilitating the cleaning of the dirt intercepted therein, making the cleaning operation more convenient and labor-saving.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A desalted water system with stable operation, comprising a desalted water tank A (1) and a desalted water tank B (2), characterized in that: A desalted water tank B (2) is provided on one side of the desalted water tank A (1), and one side of the desalted water tank A (1) and the desalted water tank B (2) are both connected to a delivery pipe (3), one side of the delivery pipe (3) is connected in series with a normal water supply pump A (4), a normal water supply pump B (5), a frequency conversion integrated machine starting water supply pump A (6), and a frequency conversion integrated machine starting water supply pump B (7), one end of the normal water supply pump A (4), the normal water supply pump B (5), the frequency conversion integrated machine starting water supply pump A (6), and the frequency conversion integrated machine starting water supply pump B (7) away from the delivery pipe (3) is respectively connected to a cleaning water tank inlet pipe (9), a laboratory water pipe (10), and a main machine room connecting pipe (11) through a collecting pipe, and the other ends of the normal water supply pump A (4), the normal water supply pump B (5), the frequency conversion integrated machine starting water supply pump A (6), and the frequency conversion integrated machine starting water supply pump B (7) are connected to a flushing water pump inlet (8); The outer sides of the desalted water tank A (1) and the desalted water tank B (2) are both sleeved with an outer sleeve (12), the side ends of the outer sleeve (12) are fixedly connected with four groups of connecting threaded rods (13), the tops of the connecting threaded rods (13) are limitedly connected with a top cover (14) through nut seats, the middle part of the bottom end of the top cover (14) is fixedly connected with an air collecting hood (15), the side ends of the air collecting hood (15) are evenly provided with air inlet slots (24), and the inner side of the air collecting hood (15) is rotatably connected with fan blades (16), the bottom air outlet end of the air collecting hood (15) is connected with an air collecting box (17), and the bottom side ends of the air collecting box (17) are connected with multiple groups of air distribution ducts (18) at equal angles, and the bottom side ends of the outer sleeve (12) are evenly provided with exhaust slots (19).

2. A stably operated desalinated water system according to claim 1, characterized in that: The A frequency conversion integrated machine starting water supply pump (6) and the B frequency conversion integrated machine starting water supply pump (7) replace the original industrial frequency starting water supply pump, and the A frequency conversion integrated machine starting water supply pump (6) and the B frequency conversion integrated machine starting water supply pump (7) are both driven by the frequency conversion integrated machine.

3. A stably operated desalinated water system according to claim 1, characterized in that: A cooling chamber is provided between the outer walls of the desalted water tank A (1) and the desalted water tank B (2) and the inner wall of the outer sleeve (12), and the bottom air outlet end of the air distribution duct (18) extends into the cooling chamber.

4. A stably operated desalinated water system according to claim 1, characterized in that: A sealing cover is provided at the bottom of the gas collecting hood (15) corresponding to the top position of the desalted water tank A (1) and the desalted water tank B (2). The top cover (14) is adjusted in position by connecting the threaded rod (13). The gas collecting hood (15) and the sealing cover are driven by the top cover (14) to cover the top of the desalted water tank A (1) and the desalted water tank B (2).

5. The stable desalination water system according to claim 1, characterized in that: The end of the delivery pipe (3) is connected to a mounting box (20), the inner side of the mounting box (20) is embedded and connected to an interception box (21), both side ends of the interception box (21) are bonded with sealing strips (22), and the bottom of the interception box (21) is embedded and connected to an interception bottom net (23).

6. A desalinated water system with stable operation according to claim 5, characterized in that: The sealing strip (22) at the edge of the interception box (21) is in close contact with the sliding connection between the sealing strip (22) and the installation box (20).

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