Low-pressure water feeding system applied to boiler

Abstract

The utility model discloses a low-pressure water feeding system applied to boilers. A first boiler fixed-row mother pipe is communicated with a first boiler; the first reverse water feeding unit is communicated with the first furnace fixed-row mother pipe; the first boiler steam pocket is communicated with the first boiler fixed-row mother pipe through a first pipeline, and the first boiler steam pocket is used for conveying water to the boiler through the first boiler fixed-row mother pipe; and the drain tank is connected with the first pipeline and is used for conveying water to the first boiler steam pocket and / or the first boiler fixed-row mother pipe. The first boiler fixed-row mother pipe is used as a main channel for low-pressure water feeding, and synchronous water feeding of the first reverse water feeding unit, the first boiler steam pocket and the drain tank is combined, so that rapidness, high efficiency and automation of the water feeding process of the boiler are achieved. The water feeding time is shortened, the operation process is simplified, and manpower and material resource consumption is reduced. And meanwhile, by utilizing the water remained in the first boiler steam pocket during detection, the water loss is reduced, and the water injection efficiency of the drain tank is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler water supply, in particular to a low-pressure water supply system applied to a boiler. Background Art

[0002] In the existing boiler system, the low-pressure water filling process of the boiler often faces the problems of low efficiency and long time consumption, which causes considerable troubles for the startup and daily operation and maintenance of the boiler. Specifically, the traditional low-pressure water filling method relies on the small-diameter desalted water pipeline to directly introduce the fixed-row header for water filling. In this process, it is necessary to close multiple manual valves from the fixed-row mother pipe to the fixed-row expansion tank, and check and open multiple manual and electric doors for sewage one by one, and then start the water filling process. This method is not only complicated to operate and has a large number of valves, but also due to the limitation of pipe diameter, the water filling speed is extremely slow. It usually takes about 12 hours to fill the boiler with water. This long wait not only wastes manpower and material resources, but also seriously affects the rapid startup and efficient operation of the boiler and its supporting equipment such as paper machines, which has an adverse impact on the company's production plan and economic benefits.

[0003] In addition, the traditional low-pressure water supply method is particularly insufficient in emergency repairs or situations where the boiler needs to be started quickly, because the long water supply process cannot win valuable time for repair work and may cause stagnation or delay of the production line. Therefore, in view of this technical pain point, it is necessary to transform and optimize the low-pressure water supply structure of the boiler to improve the water supply efficiency, shorten the water supply time, simplify the operation process, and reduce the consumption of manpower and material resources. Utility Model Content

[0004] In view of the above problems, the present application provides a low-pressure water supply system applied to a boiler to improve the boiler water supply efficiency.

[0005] To achieve the above objectives, the present application provides a low-pressure water supply system for a boiler, comprising:

[0006] First boiler;

[0007] a first furnace fixed row mother pipe, wherein the first furnace fixed row mother pipe is connected to the first boiler;

[0008] A first reverse water supply unit, wherein the first reverse water supply unit is connected to the first boiler fixed row mother pipe;

[0009] a first boiler steam drum, wherein the first boiler steam drum is connected to the first boiler fixed and discharged main pipe through a first pipeline, and the first boiler steam drum is used to transport water to the boiler through the first boiler fixed and discharged main pipe;

[0010] A drain tank, the drain tank and the first pipeline, the drain tank is used to transport water to the first boiler steam drum and / or the first boiler fixed drain main pipe.

[0011] In the technical solution of the embodiment of the present application, the drain box includes: a drain tank and a drain unit; the drain tank and the drain unit are mutually conductive, and the drain tank and the drain unit are connected in series;

[0012] The drain unit comprises: a first drain pump and a second drain pump; the first drain pump and the second drain pump are connected in parallel.

[0013] In the technical solution of the embodiment of the present application, the first reverse water supply unit is connected to the first boiler fixed row mother pipe through a second pipeline;

[0014] One end of the first pipeline is connected to the first boiler drum, and the other end of the first pipeline is connected to the second pipeline

[0015] The drain tank is connected to the first pipeline via a third pipeline.

[0016] The technical solution of the embodiment of the present application includes: a first valve group, a second valve group and a third valve group;

[0017] The first valve group is placed on the first pipeline and is located between the first pipeline and the connection node of the third pipeline to the second pipeline;

[0018] The second valve group is placed on the third pipeline;

[0019] The third valve group is placed on the second pipeline.

[0020] The technical solution of the embodiment of the present application also includes:

[0021] A fixed-row expansion tank, wherein the fixed-row expansion tank is connected to the fixed-row main pipe of the first furnace, and the fixed-row expansion tank is used to accommodate waste water discharged from the first boiler.

[0022] The technical solution of the embodiment of the present application also includes:

[0023] Second boiler;

[0024] The second furnace fixed row mother pipe is connected to the second boiler; and the second furnace fixed row mother pipe is connected to the fixed row expander;

[0025] A second reverse water supply unit, wherein the second reverse water supply unit is connected to the second boiler fixed row mother pipe;

[0026] a second boiler steam drum, wherein the second boiler steam drum is connected to the second boiler fixed row mother pipe through a fourth pipeline, and the second boiler steam drum is used to transport water to the second boiler through the second boiler fixed row mother pipe;

[0027] The desalted water cooling main pipe is connected to the fourth pipeline, and the desalted water cooling main pipe is used to transport water to the second boiler steam drum and / or the second boiler fixed discharge main pipe.

[0028] In the technical solution of the embodiment of the present application, the second reverse water supply unit is connected to the second boiler fixed row mother pipe through a fifth pipeline;

[0029] One end of the fourth pipeline is connected to the second boiler drum, and the other end of the fourth pipeline is connected to the fifth pipeline;

[0030] The desalted water cooling main pipe is connected to the fourth pipeline through a sixth pipeline.

[0031] The technical solution of the embodiment of the present application includes: a fourth valve group, a fifth valve group and a sixth valve group;

[0032] The fourth valve group is placed on the fourth pipeline and is located between the sixth pipeline and the connection node of the fourth pipeline to the fifth pipeline;

[0033] The fifth valve group is placed on the sixth pipeline;

[0034] The sixth valve group is placed on the fifth pipeline.

[0035] Different from the prior art, the above technical solution realizes the rapid, efficient and automated boiler water filling process by utilizing the first boiler fixed row mother pipe as the main channel for low-pressure water filling, combined with the synchronous water filling of the first reverse water filling unit, the first boiler drum and the drain tank. It not only shortens the water filling time, but also simplifies the operation process and reduces the consumption of manpower and material resources. At the same time, by utilizing the water retained in the first boiler drum during the detection, it not only reduces the water loss, but also improves the efficiency of water filling in the drain tank.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A structural diagram of a low-pressure water supply system applied to a boiler according to a specific implementation method;

[0039] Figure 2 This is a structural diagram of the first boiler fixed row mother pipe, the first reverse water supply unit, the first boiler steam drum and the drain tank in a specific implementation manner;

[0040] Figure 3 This is a structural diagram of the second furnace fixed row mother pipe, the second reverse water supply unit, the second furnace drum and the desalted water cooling mother pipe in a specific implementation manner;

[0041] Figure 4 It is a structural diagram of the drain box described in the specific implementation method;

[0042] Figure 5 It is a schematic diagram of the connection between the first furnace fixed row mother pipe or the second furnace fixed row mother pipe and the boiler in a specific implementation manner.

[0043] Description of reference numerals:

[0044] 1. The first boiler fixed row main pipe; 2. The first reverse water supply unit; 3. The first boiler drum; 4. The drain tank; 5. The fixed row expansion tank; 6. The second boiler fixed row main pipe; 7. The second reverse water supply unit; 8. The second boiler drum; 9. The demineralized water cooling main pipe; 10. The first pipeline; 11. The second pipeline; 12. The third pipeline; 13. The fourth pipeline; 14. The fifth pipeline; 15. The sixth pipeline; 16. The first valve group; 17. The second valve group; 18. The third valve group; 19. The fourth valve group; 20. The fifth valve group; 21. The sixth valve group;

[0045] 41. Drainage chamber; 42. Drainage unit;

[0046] 421, a first drain pump; 422, a second drain pump. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] First of all, it should be noted that after long-term use, the boiler needs to be inspected and repaired. During the inspection and repair process, it is often necessary to drain the water in the boiler and refill it with water after the inspection and repair is completed. Since a long water filling time will affect the production capacity and production efficiency, please refer to Figures 1 to 5 This embodiment provides a low-pressure water supply system for a boiler, comprising:

[0056] First boiler;

[0057] A first furnace fixed row mother pipe 1, wherein the first furnace fixed row mother pipe is connected to the first boiler;

[0058] A first reverse water supply unit 2, wherein the first reverse water supply unit 2 is connected to the first furnace fixed row mother pipe 1;

[0059] A first boiler steam drum 3, wherein the first boiler steam drum 3 is connected to the first boiler fixed discharge main pipe 1 through a first pipeline 10, and the first boiler steam drum 3 is used to transport water to the boiler through the first boiler fixed discharge main pipe 1;

[0060] The drain tank 4 is connected to the first pipeline 10 , and the drain tank 4 is used to transport water to the first boiler steam drum 3 and / or the first boiler fixed and discharged main pipe 1 .

[0061] The first boiler is a main device that needs to be filled with water.

[0062] The first boiler fixed discharge main pipe 1 is connected to the first boiler, preferably connected to the bottom of the first boiler, for collecting and discharging impurities and waste water during boiler operation. In this embodiment, the first boiler fixed discharge main pipe 1 is a low-pressure water supply channel.

[0063] The first reverse water supply unit 2 is directly connected to the first boiler fixed discharge main pipe 1. The first reverse water supply unit 2 is used to deliver water to the first boiler fixed discharge main pipe 1; that is, the first reverse water supply unit 2 is a boiler water injection path.

[0064] The first boiler drum 3 is used to separate steam and water and maintain a stable water level inside the boiler. In this embodiment, the first boiler drum 3 is connected to the first boiler fixed row mother pipe 1 through the first pipeline 10, so that the first boiler drum 3 can be used as another water injection path during the water filling operation.

[0065] Furthermore, during maintenance, it is necessary to inject water into the first boiler drum 3 for inspection and perform a water pressure test; during this process, the first boiler drum 3 will store a large amount of water, and when the maintenance is completed, the first boiler drum 3 can directly inject water into the first boiler fixed row mother pipe 1 through the first pipeline 10.

[0066] The drain tank 4 is used to store condensed water or drain water generated by the boiler system or other equipment, and the water can be used as a supplementary water source for boiler water supply after being processed. In this embodiment, the drain tank 4 is connected to the first pipeline 10 through a pipeline. When water supply is required, the corresponding valve can be opened to allow the water in the drain tank 4 to flow into the first boiler drum 3 or the first boiler fixed discharge main pipe 1, and then enter the boiler system.

[0067] Specifically, when the overhaul is being carried out, the water in the drain tank 4 flows into the first boiler steam drum 3 , and when the overhaul is completed, the water in the drain tank 4 flows into the first boiler fixed row mother pipe 1 .

[0068] In actual operation, when the first boiler is overhauled and is in a state where it can accept water supply, the valve from the first boiler fixed row mother pipe 1 to the fixed row expansion tank 5 is closed to reduce water flow resistance.

[0069] The first reverse water supply unit 2, the drain tank 4 and the first boiler drum 3 are started, so that the water in the drain tank 4, the first boiler drum 3 and the first reverse water supply unit 2 enters the first boiler fixed discharge main pipe 1. When the water level of the first boiler drum 3 reaches the preset value, the water supply operation is stopped. At this time, the boiler system has completed the low-pressure water supply process and is ready to enter the next startup or operation stage.

[0070] Different from the prior art, the above technical solution realizes the rapidity, efficiency and automation of the boiler water filling process by utilizing the first boiler fixed row mother pipe 1 as the main channel for low-pressure water filling, combined with the synchronous water filling of the first reverse water filling unit 2, the first boiler drum 3 and the drain tank 4. It not only shortens the water filling time, but also simplifies the operation process and reduces the consumption of manpower and material resources. At the same time, by utilizing the water retained in the first boiler drum 3 during the detection, it not only reduces the water loss, but also improves the efficiency of water filling of the drain tank 4.

[0071] According to some embodiments of the present application, referring to Figure 4 The drain box 4 includes: a drain chamber 41 and a drain unit 42; the drain chamber 41 and the drain unit 42 are connected to each other, and the drain chamber 41 and the drain unit 42 are connected in series;

[0072] The drain unit 42 includes a first drain pump 421 and a second drain pump 422 . The first drain pump 421 and the second drain pump 422 are connected in parallel.

[0073] The drain tank 41 is used to collect condensed water or drain from the boiler system or other equipment, and the drain unit 42 is used to transport water to the first boiler or the first boiler drum 3 by pumping. Specifically, the drain unit 42 includes: the first drain pump 421 and the second drain pump 422, the first drain pump 421 and the second drain pump 422 are connected in parallel, and one or two pumps can be flexibly selected to work simultaneously according to actual needs.

[0074] When the first boiler system needs to be filled with water, the first drain pump 421 can be selectively started or the first and second drain pumps 422 can be started simultaneously. Since the first drain pump 421 and the second drain pump 422 are connected in parallel, they can jointly undertake a greater water delivery task and improve the water supply efficiency. The parallel setting can increase the delivery speed of drain water, thereby shortening the boiler water supply time.

[0075] According to some embodiments of the present application, referring to Figure 1 and Figure 2 , the first reverse water supply unit 2 is connected to the first boiler fixed row mother pipe 1 through the second pipeline 11;

[0076] One end of the first pipeline 10 is connected to the first boiler drum 3, and the other end of the first pipeline 10 is connected to the second pipeline 11.

[0077] The drain tank 4 is connected to the first pipeline 10 via a third pipeline 12 .

[0078] During the water supply process, the first reverse water supply unit 2 is started and water is injected into the second pipeline 11. The water then enters the first boiler fixed discharge main pipe 1 through the second pipeline 11. At the same time, the condensed water or drain water in the drain tank 4 enters the first pipeline 10 through the third pipeline 12, and flows along the first pipeline 10 to the second pipeline 11 until entering the first boiler fixed discharge main pipe 1. At the same time, the water in the first boiler drum 3 can enter the second pipeline 11 through the first pipeline 10 and enter the first boiler fixed discharge main pipe 1.

[0079] According to some embodiments of the present application, referring to Figure 1 and Figure 2 , including: a first valve group 16, a second valve group 17 and a third valve group 18;

[0080] The first valve group 16 is placed on the first pipeline 10 and is located between the connection node between the first pipeline 10 and the third pipeline 12 and the second pipeline 11;

[0081] The second valve group 17 is placed on the third pipeline 12;

[0082] The third valve group 18 is disposed on the second pipeline 11 .

[0083] In order to achieve precise control of the water supply process, three groups of valves are included, which can be opened or closed as needed to adjust the water flow distribution and flow rate.

[0084] Specifically, during the water filling process, the operator controls the direction and flow of water by operating these valves. When testing, the first valve group 16 is closed so that the water in the drain tank 4 can enter the first boiler drum 3; when the first boiler water filling operation is performed, the first valve group 16, the second valve group 17 and the third valve group 18 are opened at the same time.

[0085] According to some embodiments of the present application, referring to Figures 1 to 3 , and also includes: a fixed-row expansion tank 5, which is connected to the first furnace fixed-row mother pipe 1 through a fourth pipeline 13, and the fixed-row expansion tank 5 is used to accommodate wastewater discharged from the first boiler.

[0086] The fixed discharge expansion tank 5 is connected to the fixed discharge main pipe 1 of the first boiler and the fixed discharge main pipe 6 of the second boiler mentioned below through pipelines. It is ensured that the wastewater discharged from the first boiler and the second boiler can smoothly flow into the fixed discharge expansion tank 5 for temporary storage and treatment. The fixed discharge expansion tank 5 generally has sufficient volume to accommodate a certain amount of wastewater, and is equipped with a pressure release device to maintain its internal pressure within a safe range.

[0087] During the normal operation of the first boiler and the second boiler, a certain amount of wastewater will be generated. These wastewaters may contain impurities such as incompletely burned fuel residues, salts, minerals, etc. In order to keep the water quality inside the boiler clean and the system running stably, these wastewaters need to be discharged regularly. When it is necessary to discharge wastewater, open the valve between the fixed-discharge mother pipe 1 of the first boiler and the fixed-discharge expansion tank 5, or open the valve between the fixed-discharge mother pipe 6 of the second boiler and the fixed-discharge expansion tank 5, and the wastewater will flow into the fixed-discharge expansion tank 5 under the action of the pressure difference. In the fixed-discharge expansion tank 5, some impurities in the wastewater may settle due to gravity, while water with higher cleanliness may be recycled or treated through other means.

[0088] According to some embodiments of the present application, referring to Figure 1 and Figure 3 , also includes:

[0089] Second boiler;

[0090] The second furnace fixed row mother pipe 6 is connected to the second boiler; and the second furnace fixed row mother pipe 6 is connected to the fixed row expansion container 5;

[0091] A second reverse water supply unit 7, wherein the second reverse water supply unit 7 is connected to the second furnace fixed row mother pipe 6;

[0092] a second boiler steam drum 8, wherein the second boiler steam drum 8 is connected to the second boiler fixed discharge main pipe 6 through a fourth pipeline 13, and the second boiler steam drum 8 is used to transport water to the second boiler through the second boiler fixed discharge main pipe 6;

[0093] The desalted water cooling main pipe 9 is connected to the fourth pipeline 13, and the desalted water cooling main pipe 9 is used to transport water to the second boiler steam drum 8 and / or the second boiler fixed discharge main pipe 6.

[0094] The second boiler is similar to the first boiler and has an independent operation system. The second boiler fixed discharge main pipe 6 is connected to the second boiler and is used to collect and discharge wastewater generated by the second boiler. At the same time, the second boiler fixed discharge main pipe 6 is also connected to the fixed discharge expansion tank 5 through a pipeline, so that the wastewater of the second boiler can also be collected in the fixed discharge expansion tank 5.

[0095] The second reverse water supply unit 7 is an independent water supply device, which is connected to the second boiler fixed discharge main pipe 6 through the fifth pipeline 14. When necessary, the second reverse water supply unit 7 can inject water into the second boiler fixed discharge main pipe 6 to support the water supply process of the second boiler. The second boiler drum 8 is connected to the second boiler fixed discharge main pipe 6 through the fourth pipeline 13, and water is delivered to the second boiler through the second boiler fixed discharge main pipe 6 when necessary.

[0096] As a part of the water purification system, the demineralized water cooling main pipe 9 is connected to the fourth pipe 13 through the sixth pipe 15 to provide demineralized water to the second boiler drum 8 and / or the second boiler fixed discharge main pipe 6 to ensure the cleanliness and stability of the water quality inside the boiler.

[0097] During the operation of the boiler, the waste water generated by the second boiler is discharged into the fixed discharge expansion tank 5 through the second boiler fixed discharge main pipe 6. At the same time, when the second boiler needs water supply, the second reverse water supply unit 7 injects water into the second boiler fixed discharge main pipe 6 through the fifth pipeline 14. The second boiler drum 8 delivers water to the second boiler through the fourth pipeline 13 and the second boiler fixed discharge main pipe 6. The desalted water cooling main pipe 9 provides desalted water to the second boiler fixed discharge main pipe 6 to maintain the cleanliness and stability of the water quality inside the boiler.

[0098] During maintenance, the desalted water cooling main pipe 9 provides desalted water to the second boiler drum 8 and stores water.

[0099] According to some embodiments of the present application, referring to Figure 1 and Figure 3, the second reverse water supply unit 7 is connected to the second boiler fixed row mother pipe 6 through the fifth pipeline 14;

[0100] One end of the fourth pipeline 13 is connected to the second boiler drum 8, and the other end of the fourth pipeline 13 is connected to the fifth pipeline 14;

[0101] The desalted water cooling main pipe 9 is connected to the fourth pipeline 13 via a sixth pipeline 15 .

[0102] One end of the fourth pipeline 13 is connected to the second boiler drum 8, and the other end is connected to the fifth pipeline 14, so that the second boiler drum 8 can inject water into the second boiler fixed discharge main pipe 6 through the fourth pipeline 13 and the fifth pipeline 14. At the same time, the desalted water cooling main pipe 9 is connected to the fourth pipeline 13 through the sixth pipeline 15, so as to provide desalted water to the second boiler drum 8 and / or the second boiler fixed discharge main pipe 6.

[0103] During maintenance, it is necessary to inject water into the second boiler drum 8 for inspection and perform a water pressure test; during this process, the second boiler drum 8 will store a large amount of water. When the maintenance is completed, the second boiler drum 8 can directly inject water into the second boiler fixed and discharged main pipe 6 through the fourth pipeline 13.

[0104] When the second boiler needs water supply, the second reverse water supply unit 7 injects water into the second boiler fixed discharge main pipe 6 through the fifth pipeline 14 and the fourth pipeline 13. At the same time, the desalted water cooling main pipe 9 provides desalted water to the second boiler fixed discharge main pipe 6 through the sixth pipeline 15 and the fourth pipeline 13. The second boiler drum 8 provides water to the second boiler fixed discharge main pipe 6 through the fifth pipeline 14 and the fourth pipeline 13, making the supply and distribution of water resources more efficient.

[0105] According to some embodiments of the present application, referring to Figure 1 and Figure 3 , including: a fourth valve group 19, a fifth valve group 20 and a sixth valve group 21;

[0106] The fourth valve group 19 is placed on the fourth pipeline 13 and is located between the sixth pipeline 15 and the connection node of the fourth pipeline 13 to the fifth pipeline 14;

[0107] The fifth valve group 20 is placed on the sixth pipeline 15;

[0108] The sixth valve group 21 is disposed on the fifth pipeline 14 .

[0109] In order to achieve precise control of the water supply process, three groups of valves are included, which can be opened or closed as needed to adjust the water flow distribution and flow rate.

[0110] Specifically, during the water filling process, the operator controls the direction and flow of water by operating these valves. When testing, the fourth valve group 19 is closed so that the water in the drain tank 4 can enter the second boiler drum 8; when the second boiler water filling operation is performed, the fourth valve group 19, the fifth valve group 20 and the sixth valve group 21 are opened at the same time.

[0111] The first to sixth valve groups 21 may include a plurality of manual valves and / or electric valves.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A low-pressure water supply system for a boiler, characterized in that: include: First boiler; a first furnace fixed row mother pipe, wherein the first furnace fixed row mother pipe is connected to the first boiler; A first reverse water supply unit, wherein the first reverse water supply unit is connected to the first boiler fixed row mother pipe; a first boiler steam drum, wherein the first boiler steam drum is connected to the first boiler fixed and discharged main pipe through a first pipeline, and the first boiler steam drum is used to transport water to the boiler through the first boiler fixed and discharged main pipe; A drain tank, the drain tank and the first pipeline, the drain tank is used to transport water to the first boiler steam drum and / or the first boiler fixed drain main pipe.

2. A low-pressure water supply system for a boiler according to claim 1, characterized in that: The drain box comprises: a drain chamber and a drain unit; the drain chamber and the drain unit are in conduction with each other, and the drain chamber and the drain unit are connected in series; The drain unit comprises: a first drain pump and a second drain pump; the first drain pump and the second drain pump are connected in parallel.

3. A low-pressure water supply system for a boiler according to claim 1, characterized in that: The first reverse water supply unit is connected to the first boiler fixed row mother pipe through a second pipeline; One end of the first pipeline is connected to the first boiler drum, and the other end of the first pipeline is connected to the second pipeline; The drain tank is connected to the first pipeline via a third pipeline.

4. A low-pressure water supply system for a boiler according to claim 3, characterized in that: include: a first valve group, a second valve group, and a third valve group; The first valve group is placed on the first pipeline and is located between the first pipeline and the connection node of the third pipeline to the second pipeline; The second valve group is placed on the third pipeline; The third valve group is placed on the second pipeline.

5. A low-pressure water supply system for a boiler according to claim 1, characterized in that: Also includes: A fixed-row expansion tank, wherein the fixed-row expansion tank is connected to the fixed-row main pipe of the first furnace, and the fixed-row expansion tank is used to accommodate waste water discharged from the first boiler.

6. A low-pressure water supply system for a boiler according to claim 5, characterized in that: Also includes: Second boiler; a second furnace fixed row mother pipe, wherein the second furnace fixed row mother pipe is connected to the second boiler; The fixed row mother pipe of the second furnace is in conduction with the fixed row expansion vessel; A second reverse water supply unit, wherein the second reverse water supply unit is connected to the second boiler fixed row mother pipe; a second boiler steam drum, wherein the second boiler steam drum is connected to the second boiler fixed row mother pipe through a fourth pipeline, and the second boiler steam drum is used to transport water to the second boiler through the second boiler fixed row mother pipe; The desalted water cooling main pipe is connected to the fourth pipeline, and the desalted water cooling main pipe is used to transport water to the second boiler steam drum and / or the second boiler fixed discharge main pipe.

7. A low-pressure water supply system for a boiler according to claim 6, characterized in that: The second reverse water supply unit is connected to the second boiler fixed row mother pipe through a fifth pipeline; One end of the fourth pipeline is connected to the second boiler drum, and the other end of the fourth pipeline is connected to the fifth pipeline; The desalted water cooling main pipe is connected to the fourth pipeline through a sixth pipeline.

8. A low-pressure water supply system for a boiler according to claim 7, characterized in that: include: a fourth valve group, a fifth valve group, and a sixth valve group; The fourth valve group is placed on the fourth pipeline and is located between the sixth pipeline and the connection node of the fourth pipeline to the fifth pipeline; The fifth valve group is placed on the sixth pipeline; The sixth valve group is placed on the fifth pipeline.

Images