Pipeline assembly for improving reliability of demineralized water system

Abstract

The utility model relates to a pipeline assembly for improving reliability of a demineralized water system. The pipeline assembly comprises a demineralized water tank; an inlet of the first desalting water pump group is connected with the desalting water tank, and an outlet of the first desalting water pump group is connected with an inlet of the first desalting water main pipe; an outlet of the first desalted water main pipe is connected to a first water supply system; an inlet of the second desalted water pump group is connected with the desalted water tank, and an outlet of the second desalted water pump group is connected with the second desalted water mother pipe; an outlet of the second desalted water main pipe is connected to a second water supply system; and the connecting pipe section is connected with the first desalted water main pipe and the second desalted water main pipe. Water flow is adjusted through the control valve, water can be supplied to the second water supply system through the first desalted water mother pipe under the condition that the second desalted water pump set is not needed, and therefore the use frequency of the second desalted water pump set is reduced, and the service life of the second desalted water pump set is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of desalted water systems, in particular to the technical field of a pipeline component for improving the reliability of desalted water systems. Background Art

[0002] During the operation of a thermal power plant, ensuring the stability and efficiency of the steam-water system is crucial. Our company's current demineralized water makeup system design consists of two main components: a secondary demineralized water makeup system and a primary demineralized water makeup system. The primary demineralized water makeup system is generally designed to handle small flow rates during unit operation and requires long-term continuous operation to address potential small flow losses such as runaway, bubbling, dripping, and leaks.

[0003] Secondly, the secondary desalted water replenishment system is responsible for providing replenishment water to key equipment such as the fixed cooling water tank, closed cooling water tank, main engine vacuum pump, induced draft fan vacuum pump, induced draft fan condenser, and HVAC heating system. Currently, replenishment of these equipment mainly relies on the intermittent activation of the secondary desalted water pump group, resulting in the need to refill and drain the secondary desalted water jelly pipe every time the pump is activated. This practice is not only inefficient but also presents the following major problems:

[0004] Frequent operation of the safety gate: Since the second desalination jellyfish pipe needs to be constantly refilled with water, the safety gate located in the integrated pipe rack rainwater pump room frequently operates, resulting in water spraying, which may pose a potential safety risk to surrounding equipment.

[0005] Increased equipment loss: The intermittent and frequent operation of the second desalted water pump group can easily lead to damage to key parts such as the pump shaft end seal, valve seal, flange, etc., increasing maintenance costs and repair frequency.

[0006] Increased energy consumption: Frequent starting and stopping of the desalted water pump of the second desalted water make-up system can easily lead to an increase in the power consumption rate of the plant, which is not conducive to the energy conservation and emission reduction goals of the power plant. Utility Model Content

[0007] The technical problem to be solved by the utility model is to reduce the use frequency of the second desalted water pump group, reduce its failure rate and the power consumption rate of the plant, thereby improving the reliability, flexibility and energy-saving effect of the desalted water system.

[0008] In order to solve the above technical problems, the utility model provides a pipeline assembly for improving the reliability of a desalted water system, comprising:

[0009] Desalinated water tank;

[0010] a first desalted water pump group, wherein the inlet of the first desalted water pump group is connected to the desalted water tank, the outlet of the first desalted water pump group is connected to the inlet of the first desalted water jellyfish pipe; and the outlet of the first desalted water jellyfish pipe is connected to the first water supply system;

[0011] a second desalted water pump group, wherein the inlet of the second desalted water pump group is connected to the desalted water tank, the outlet of the first desalted water pump group is connected to a second desalted water jellyfish pipe; and the outlet of the second desalted water jellyfish pipe is connected to a second water supply system;

[0012] A communication pipe section connecting the first desalted jellyfish pipe and the second desalted jellyfish pipe.

[0013] Furthermore, the second water supply system includes a closed water tank, a condensation jellyfish pipe, an induced draft fan, a constant cooling water tank, a vacuum pump and an indirect cooling system, all of which are connected to the second desalted jellyfish pipe.

[0014] Further, the first water supply system includes a condenser throat and a condensate pump mechanical seal both connected to the first desalted jellyfish pipe.

[0015] Furthermore, at least one control valve is provided on the connecting pipe section for adjusting the flow of desalted water from the first water supply system to the second water supply system.

[0016] Furthermore, the control valve includes a manual stop valve, which is used to cut off the connection between the first desalted jellyfish pipe and the second desalted jellyfish pipe when needed.

[0017] Furthermore, the control valve further includes a check valve, which is used to prevent the backflow of the desalted water.

[0018] Furthermore, the closed water tank, the condensate jellyfish pipe, the induced draft fan, the constant cooling water tank, the vacuum pump and the inlet end of the indirect cooling system are all connected to a switch valve.

[0019] Furthermore, a liquid level gauge is provided in each of the closed water tank, the condensate jellyfish pipe, the induced draft fan, the constant cooling water tank, the vacuum pump and the indirect cooling system, and each liquid level gauge is connected to the corresponding switch valve through a control unit.

[0020] Furthermore, the liquid level meter is any one of a float level meter, an ultrasonic level meter or a pressure level meter.

[0021] Furthermore, the outlet of the first desalted water pump group is connected to the inlet of a mixer, and the outlet of the mixer is respectively connected to the inlet of the connecting pipe section and the inlet of the first desalted water jellyfish pipe.

[0022] Compared with the prior art, the technical solution provided by the embodiments of the present invention can achieve at least the following beneficial effects:

[0023] First, the utility model connects the first desalted jellyfish pipe with the second desalted jellyfish pipe through a connecting pipe section, thereby achieving flexible switching of waterways and reducing the risk of paralysis of the entire desalted water system due to failure of a single water supply system.

[0024] Second, the utility model regulates the water flow by controlling the valve, and can use the first desalted water jellyfish pipe to supply water to the second water supply system without the need for the second desalted water pump group, thereby reducing the frequency of use of the second desalted water pump group and extending the service life of the second desalted water pump group.

[0025] Third, the utility model reduces the number of operations of the second desalted water pump group and directly utilizes the connecting pipe section to allocate water, thereby effectively reducing the energy consumption of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, rather than limiting the present invention.

[0027] In the picture:

[0028] Desalted water tank 1; first desalted water pump group 2; first desalted water jellyfish pipe 3; first water supply system; condenser throat 41; condensate pump mechanical seal 42; second desalted water pump group 5; second desalted water jellyfish pipe 6; closed water tank 71; condensate jellyfish pipe 72; induced draft fan 73; constant cooling water tank 74; vacuum pump 75; indirect cooling system 76; connecting pipe section 8; manual stop valve 811; check valve 812. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described 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.

[0030] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar expressions used in the specification and claims of this utility model patent application do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation on quantity, but rather indicate the presence of at least one.

[0031] refer toFigure 1 This embodiment provides a pipeline assembly for improving the reliability of a desalted water system, including:

[0032] Desalted water tank 1;

[0033] a first desalted water pump group 2, the inlet of the first desalted water pump group 2 being connected to the desalted water tank 1, the outlet of the first desalted water pump group 2 being connected to the inlet of the first desalted water jellyfish pipe 3; and the outlet of the first desalted water jellyfish pipe 3 being connected to the first water supply system;

[0034] a second desalted water pump group 5, the inlet of the second desalted water pump group 5 being connected to the desalted water tank 1, and the second desalted water pump group 5 being connected to the second desalted water jellyfish pipe 6; and the outlet of the second desalted water jellyfish pipe 6 being connected to the second water supply system;

[0035] The connecting pipe section 8 connects the first desalted jellyfish pipe 3 and the second desalted jellyfish pipe 6 .

[0036] The present invention connects the two water supply systems by adding a connecting pipe section 8 between the first desalted water jellyfish pipe 3 and the second desalted water jellyfish pipe 6. This allows for communication between the two water supply systems. Thus, if the second desalted water pump unit 5 requires maintenance or malfunctions, the first desalted water pump unit 2 can be used to supply water to the second water supply system via the connecting pipe section 8, thereby ensuring water supply continuity and system reliability.

[0037] In a preferred embodiment, the second water supply system includes a closed water tank 71, a condensate jellyfish pipe 72, an induced draft fan 73, a constant cooling water tank 74, a vacuum pump 75, and an indirect cooling system 76. The closed water tank 71, the condensate jellyfish pipe 72, the induced draft fan 73, the constant cooling water tank 74, the vacuum pump 75, and the indirect cooling system 76 are all connected to the second desalted jellyfish pipe 6.

[0038] Specifically, the closed water tank 71 is a part of the second water supply system, and is used to store a certain amount of desalted water to ensure the continuity and stability of water supply during the initial startup or in emergency situations.

[0039] Condensate pipe 72 collects and transports condensed steam back into the system for reuse, improving water resource efficiency. Second desalted jellyfish pipe 6 replenishes desalted water into condensate pipe 72, effectively reducing the salt and other impurities in the condensate, improving water quality and extending equipment life.

[0040] The bearings of the large induced draft fan (IDF) 73 require cooling water to maintain normal operating temperatures. While this cooling water is typically recycled, a certain amount of demineralized water is added to maintain water quality and cooling effectiveness. Furthermore, to prevent flue gas leakage and ensure the fan's seal, some induced draft fans utilize a water seal system. This seal water needs to be regularly replaced or replenished, and demineralized water is used for this purpose.

[0041] The cooling water tank 74 is a key component in the generator stator coil cooling water system, primarily used to store and supply cooling water. Cooling water enters the cooling system through the cooling water tank. Because the generator stator coils require extremely high water quality, even the slightest impurity or salt can cause corrosion or scaling on the coils, thereby reducing the generator's operating life. Therefore, demineralized water must be used as the cooling medium. This requires a second demineralized jellyfish pipe 6 to replenish demineralized water to remove impurities and ensure water purity that meets the requirements of the generator stator coil cooling system.

[0042] The vacuum pump 75 helps maintain the vacuum environment in the condenser and the entire steam turbine unit by extracting non-condensable gases (such as air) and condensable gases (such as water vapor) from the system. Within the vacuum pump 75, water and certain gas molecules may combine to form salt scale, which can clog the pump's channels and affect pump performance. Demineralized water effectively reduces salt scale formation and keeps the pump's channels unobstructed.

[0043] Indirect cooling system 76 removes heat from the working fluid through indirect contact, protecting equipment from high-temperature damage. In power plants, indirect cooling system 76 is typically used to cool turbine exhaust steam or other fluids requiring cooling to maintain normal equipment operation and efficiency. Pure demineralized water transfers heat more efficiently, improving the efficiency of the cooling system. This helps lower equipment operating temperatures, extend equipment life, and reduce energy consumption.

[0044] In a preferred embodiment, the first water supply system includes a condenser throat 41 and a condensate pump mechanical seal 42. The condenser throat 41 is designed to receive high-temperature steam discharged from the turbine and guide the steam into the condenser for the condensation process. The mechanical seal 42 is a key component to ensure that the condensate does not leak during transportation, while preventing external impurities from entering the pump body and the condensate system. For the condenser throat 41, the use of desalted water as a cooling medium can improve the efficiency of the condensation process because minerals and dissolved gases are removed, thereby improving heat conduction performance. In addition, the mechanical seal 42 needs to work in an impurity-free environment to maintain its performance and prevent wear. Therefore, using desalted water for the mechanical seal 42 can reduce solid particles, thereby reducing the risk of wear by solid particles.

[0045] In a preferred embodiment, at least one control valve is provided on the communication pipe section 8 for adjusting the flow rate of the desalted water from the first desalted jellyfish pipe 3 to the second desalted jellyfish pipe 6 .

[0046] In a preferred embodiment, the control valve includes a manual stop valve 811, which is used to cut off the connection between the first desalted jellyfish pipe 3 and the second desalted jellyfish pipe 6 when needed.

[0047] In a preferred embodiment, the control valve further includes a check valve 812, which is used to prevent water from flowing back. In this embodiment, the check valve 812 can prevent water from flowing back from the second desalted jellyfish pipe 6 to the first desalted jellyfish pipe 3.

[0048] In a preferred embodiment, an on-off valve is connected to the inlet of the closed water tank 71, condensate duct 72, induced draft fan 73, constant cooling water tank 74, vacuum pump 75, and indirect cooling system 76. The on-off valve allows the operator to control the water flow by precisely controlling the opening and closing of the on-off valve, ensuring that the system operates as required.

[0049] In a preferred embodiment, a liquid level gauge is installed in each of the closed water tank 71, condensate duct 72, induced draft fan 73, constant cooling water tank 74, vacuum pump 75, and indirect cooling system 76. Each level gauge is connected to a corresponding on / off valve via a control unit. The control unit precisely controls the opening and closing of the on / off valve based on the data read by the level gauge.

[0050] In a preferred embodiment, the liquid level meter is any one of a float level meter, an ultrasonic level meter or a pressure level meter.

[0051] In a preferred embodiment, the outlet of the first desalted water pump group 2 is connected to the inlet of a mixer, and the outlet of the mixer is respectively connected to the inlet of the connecting pipe section 8 and the inlet of the first desalted water jellyfish 3; when a larger flow rate is required, multiple pumps of the first desalted water pump group 2 can be started at the same time and mixed at the mixer. In addition, the setting of the mixer can make the desalted water from different pumps mixed in the mixer, which helps to ensure the consistency of water quality and may reduce problems caused by water quality differences. In addition, the mixer can also serve to store desalted water, and can respond in time when a large amount of desalted water is needed, so as to minimize the number of times the second desalted water pump group 5 is operated.

[0052] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A piping assembly for improving the reliability of a desalted water system, characterized in that: include: Desalinated water tank; a first desalted water pump group, wherein the inlet of the first desalted water pump group is connected to the desalted water tank, the outlet of the first desalted water pump group is connected to the inlet of the first desalted water jellyfish pipe; and the outlet of the first desalted water jellyfish pipe is connected to the first water supply system; a second desalted water pump group, wherein the inlet of the second desalted water pump group is connected to the desalted water tank, the outlet of the second desalted water pump group is connected to a second desalted jellyfish pipe; and the outlet of the second desalted jellyfish pipe is connected to a second water supply system; A communication pipe section connecting the first desalted jellyfish pipe and the second desalted jellyfish pipe.

2. A pipeline assembly for improving the reliability of a desalted water system according to claim 1, characterized in that: The second water supply system includes a closed water tank, a condensation jellyfish pipe, an induced draft fan, a constant cooling water tank, a vacuum pump and an indirect cooling system, all of which are connected to the second desalted jellyfish pipe.

3. A pipeline assembly for improving the reliability of a desalted water system according to claim 1, characterized in that: The first water supply system includes a condenser throat and a condensate pump mechanical seal both connected to the first desalted jellyfish pipe.

4. A pipeline assembly for improving the reliability of a desalted water system according to claim 1, characterized in that: The connecting pipe section is provided with at least one control valve for adjusting the flow of desalted water from the first desalted jellyfish pipe to the second desalted jellyfish pipe.

5. A pipeline assembly for improving the reliability of a desalted water system according to claim 4, characterized in that: The control valve includes a manual stop valve, which is used to cut off the connection between the first desalted jellyfish pipe and the second desalted jellyfish pipe when needed.

6. The pipeline assembly for improving the reliability of a desalted water system according to claim 1, characterized in that: The control valve further comprises a check valve, which is used to prevent the backflow of the desalted water.

7. The pipeline assembly for improving the reliability of a desalted water system according to claim 2, characterized in that: The closed water tank, the condensation water pipe, the induced draft fan, the constant cooling water tank, the vacuum pump and the inlet end of the indirect cooling system are all connected with a switch valve.

8. The pipeline assembly for improving the reliability of a desalted water system according to claim 7, characterized in that: A liquid level gauge is provided in each of the closed water tank, the condensate jellyfish pipe, the induced draft fan, the constant cooling water tank, the vacuum pump and the indirect cooling system, and each liquid level gauge is connected to the corresponding switch valve through a control unit.

9. The pipeline assembly for improving the reliability of a desalted water system according to claim 8, characterized in that: The liquid level meter is any one of a float level meter, an ultrasonic level meter or a pressure level meter.

10. The pipeline assembly for improving the reliability of a desalted water system according to claim 8, characterized in that: The outlet of the first desalted water pump group is connected to the inlet of a mixer, and the outlet of the mixer is respectively connected to the inlet of the connecting pipe section and the inlet of the first desalted water jellyfish pipe.

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