Boiler water pressure pressurizing system

Abstract

The invention relates to the technical field of boiler testing, in particular to a boiler water pressure pressurizing system which comprises a condensation water tank, a water feeding pump forced circulation system, an ammonia water dosing room, a water feeding system and a pressurizing system. The condensation water tank is respectively connected with the water feeding pump forced circulation system and the ammonia water dosing room, and make-up water of the condensation water tank is uniformly mixed with make-up water from the ammonia water dosing room through the water feeding pump forced circulation system; one end of the water feeding system is connected with the condensation water tank, and the other end of the water feeding system is connected with each system needing water supply and pressing; one end of the pressurizing system is connected with the condensation water tank, and the other end of the pressurizing system is connected with all systems needing water supply pressurizing. According to the invention, the maintenance quality of the equipment can be verified in advance, and potential defects can be found and processed in time, so that the controllability of the maintenance period progress is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of boiler testing, in particular to a boiler water pressure testing system. Background Art

[0002] In the current field of boiler inspection and maintenance, boiler water pressure test is a key link to ensure the safe and reliable operation of boiler heating surfaces and other pressure-bearing components. The traditional boiler water pressure test process mainly relies on formal systems to perform water supply operations to implement comprehensive water pressure tests on the boiler heating surfaces after repair. The core purpose of this process is to detect whether there are potential leakage risks on the boiler heating surfaces and pressure-bearing components, so as to discover and solve safety hazards in advance and ensure the overall performance and safety of the boiler.

[0003] However, with the continuous advancement of boiler maintenance technology and the increasing diversification of maintenance needs, the traditional water pressure test process has gradually exposed some problems. Especially for boiler units undergoing large-scale maintenance, the dismantling and maintenance progress of each device often varies greatly, which brings considerable challenges to the traditional water pressure test method. Specifically, when certain key equipment cannot be put into operation in time due to delayed maintenance progress, the entire water pressure test process may be forced to be interrupted or delayed. This not only makes it impossible for these key equipment to be effectively verified and tested in the water pressure test, but also may make it impossible for potential defects and problems to be discovered and handled in time, which has a serious negative impact on the maintenance quality and construction schedule of the boiler.

[0004] In addition, the use of formal systems in the traditional hydrostatic test process also brings certain limitations and inconveniences. During the hydrostatic test, the formal system usually needs to be temporarily shut down or isolated to ensure the accuracy and safety of the test. However, this also means that the formal system cannot be used for other normal production or maintenance tasks during this period, thereby adding additional maintenance and maintenance burdens. This limitation not only affects the overall operating efficiency of the unit, but may also further extend the recovery time and maintenance cycle of the unit, causing unnecessary troubles and losses to the operation and maintenance of the power plant. Summary of the invention

[0005] The purpose of the present invention is to provide a boiler water pressure relief system in order to solve at least one of the above technical problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A boiler water pressure reduction system, comprising: a condensate tank, a water supply pump forced circulation system, an ammonia water dosing room, a water supply system and a pressure reduction system;

[0008] The condensate tank is connected to the upper water pump forced circulation system and the ammonia dosing room respectively, and the supplementary water in the condensate tank is mixed evenly with the supplementary water from the ammonia dosing room through the upper water pump forced circulation system;

[0009] One end of the water supply system is connected to the condensate tank, and the other end is connected to each system that needs water supply and pressure testing;

[0010] One end of the pressure-pressurizing system is connected to the condensate tank, and the other end is respectively connected to each system that needs water supply and pressure-pressurizing.

[0011] Furthermore, the boiler water pressure relief system also includes: an auxiliary steam mechanism for providing a heat source for the condensate tank.

[0012] Furthermore, when the water temperature in the condensate tank is ≤20° C., the auxiliary steam mechanism heats the water in the condensate tank.

[0013] Furthermore, two ends of the upper water pump forced circulation system are respectively connected to the condensate water tank and the condensate water tank supplementary water source;

[0014] The water supply pump forced circulation system comprises a water supply pump, a water supply recirculation manual door, and a mixed water manual door.

[0015] Furthermore, a chemical sampling door is provided at the connection pipeline between the condensate water tank and the upper water pump, and the water quality in the condensate water tank is detected through the chemical sampling door.

[0016] Furthermore, the ammonia dosing room is connected to the condensate water tank via a gear pump.

[0017] Furthermore, the systems that require water supply and pressure boosting include: a primary steam system, a primary reheater system and a secondary reheater system.

[0018] Furthermore, the primary steam system is connected to the water supply system through the water wall front and rear wall inlet header drain pipes;

[0019] The primary reheater system is connected to the water supply system through the normal water discharge electric door of the primary reheater drain station at the bottom of the primary reheater drain collecting main pipe;

[0020] The secondary reheater system is connected to the water supply system through the normal water discharge electric door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting main pipe.

[0021] Furthermore, the primary steam system is connected to the pressure relief system through the primary and secondary water discharge doors at the bottom of the water-cooled wall;

[0022] The primary reheater system is connected to the pressure relief system through the primary reheater drain station high-level water discharge manual door at the bottom of the primary reheater drain collecting main pipe;

[0023] The secondary reheater system is connected to the pressure relief system through a manual high-level drain door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting main pipe.

[0024] Furthermore, the water supply system includes a pipeline flushing pipeline for flushing the inside of a newly installed pipeline.

[0025] The beneficial effects of the present invention are:

[0026] The present invention is a system capable of performing a water pressure test independently of a formal system. The system can immediately perform a separate water pressure test after the boiler heating surface and the pressure-bearing components in the system have been overhauled.

[0027] The present invention can verify the maintenance quality of the equipment in advance, discover and deal with potential defects in time, and thus ensure the controllability of the maintenance schedule. At the same time, the present invention also has the ability to be cured on site, and can exist as an independent pressure-bearing operation system during the operation of the unit, avoiding additional maintenance and repair burdens on the normal operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a boiler water pressure relief system according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the operation of a boiler water pressure relief system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The content of the present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present invention, rather than implying any limitation on the scope of the present invention.

[0031] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0032] Figure 1 A schematic diagram of the structure of a boiler water pressure relief system according to an embodiment of the present invention; Figure 2 The following is a schematic diagram of the operation of a boiler water pressure relief system according to an embodiment of the present invention. Figure 1-2As shown, according to one embodiment of the present invention, a boiler water pressure reduction system includes: a condensate tank, a water supply pump forced circulation system, an ammonia dosing room, a water supply system and a pressure reduction system;

[0033] The condensate tank is connected to the forced circulation system of the upper water pump and the ammonia dosing room respectively. The supplementary water in the condensate tank is mixed evenly with the supplementary water from the ammonia dosing room through the forced circulation system of the upper water pump;

[0034] One end of the water supply system is connected to the condensate tank, and the other end is connected to each system that needs water supply and pressure testing;

[0035] One end of the pressure-reducing system is connected to the condensate tank, and the other end is connected to each system that needs water supply and pressure-reducing.

[0036] In this embodiment, the boiler water pressure pressure system includes a condensate tank, a water pump forced circulation system, an ammonia dosing room, a water supply system and a pressure system. The condensate tank is a core component, which is connected to the water pump forced circulation system and the ammonia dosing room respectively. The former is responsible for injecting desalted water into the condensate tank as supplementary water for forced circulation, and the latter is responsible for adding supplementary water to the condensate tank to adjust the pH value. The two are fully mixed under the action of the water pump forced circulation. One end of the water supply system is connected to the condensate tank, and the other end extends to each system that needs water supply pressure. It is responsible for delivering water to these systems through the water pump forced circulation system after the water quality of the condensate tank meets the standard, and completing the water supply operation. Once the water supply operation is completed, the water supply system is isolated and stops working. At this time, the pressure system is started, one end of which is also connected to the condensate tank, and the other end is connected to the system to be tested. The water in the condensate tank is pressurized and sent to each system for water pressure pressure test through the booster pump. The connection between each system to be tested and the water supply system and the pressure test system is respectively provided with an independent valve, which can individually control the water pressure test work of each system to be tested.

[0037] The boiler hydraulic pressure test system of the present invention is an independent hydraulic pressure test system, which can quickly carry out independent tests on the boiler heating surface and pressure-bearing components after overhaul, verify the maintenance quality in advance, timely check for hidden dangers, and ensure that the overhaul progress is controllable. At the same time, the present invention can be cured on site and run as an independent pressure-bearing system, which does not affect the normal operation of the unit and reduces the burden of additional maintenance.

[0038] According to one embodiment of the present invention, the boiler water pressure relief system further includes: an auxiliary steam mechanism for providing a heat source for the condensate tank.

[0039] Preferably, when the water temperature in the condensate tank is ≤20° C., the auxiliary steam mechanism heats the water in the condensate tank.

[0040] In this embodiment, the boiler water pressure test system also includes an auxiliary steam mechanism, which is specially designed to provide the necessary heat source for the condensate tank. The auxiliary steam mechanism uses auxiliary steam to drain the fuel steam, that is, it converts the heat energy generated by the auxiliary steam system into a heat source suitable for heating the water in the condensate tank. When the system detects that the water temperature in the condensate tank drops to 20°C or below, the auxiliary steam mechanism will automatically start, and its switch will turn on, and begin to transfer heat energy to the water in the condensate tank to ensure that the water temperature is maintained within an appropriate range. This design not only enhances the flexibility of the system, but also ensures that the boiler water pressure test system can stably and efficiently perform water pressure tests even in low temperature environments, thereby further improving the overall performance and reliability of the system.

[0041] The boiler water pressure testing system of the present invention adds an auxiliary steam mechanism and utilizes the thermal energy of the auxiliary steam system to heat the condensate tank to ensure that the water temperature is not lower than 20°C, thereby enhancing the flexibility of the system, ensuring stable and efficient water pressure testing in low temperature environments, and improving the overall performance and reliability of the system.

[0042] According to one embodiment of the present invention, both ends of the upper water pump forced circulation system are respectively connected to the condensate water tank and the condensate water tank supplementary water source;

[0043] The water supply pump forced circulation system includes a water supply pump, a water supply recirculation manual door, and a mixed water manual door.

[0044] Preferably, a chemical sampling door is provided at the connection pipeline between the condensate water tank and the upper water pump, and the water quality in the condensate water tank is tested through the chemical sampling door.

[0045] In this embodiment, the forced circulation system of the upper water pump is connected between the condensate tank and the supplementary water source of the condensate tank, and the forced circulation system of the upper water pump includes a parallel connected upper water pump, a water recirculation manual door, and a mixing water manual door. In order to monitor the water quality in the condensate tank, the system installs a chemical sampling door on the connecting pipeline between the condensate tank and the upper water pump. The staff can conveniently conduct regular or irregular inspections of the water quality in the condensate tank through the chemical sampling door to ensure that the water quality meets the requirements of the water pressure test. The forced circulation system of the upper water pump is driven by the upper water pump to force the supplementary water to circulate and mix with the water from the condensate tank, while the water recirculation manual door and the mixing water manual door are used to adjust the circulation flow and the mixing ratio respectively, so as to achieve effective regulation and uniform mixing of water quality, and provide a stable and qualified water source for subsequent water pressure tests.

[0046] The boiler water pressure test system of the present invention adopts a water pump forced circulation system composed of a water pump, a water recirculation manual door and a mixing water manual door connected in parallel, and combines a chemical sampling door to mix and monitor the water quality of the condensate tank, thereby achieving effective regulation and uniform mixing of water quality and ensuring the stability and qualification of water used for hydraulic pressure testing.

[0047] According to one embodiment of the present invention, the system requiring water supply and pressure boosting includes: a primary steam system, a primary reheater system and a secondary reheater system.

[0048] Preferably, the primary steam system is connected to the water supply system through the water-cooled wall front and rear wall inlet header drain pipelines; the primary reheater system is connected to the water supply system through the normal drain electric door of the primary reheater drain station at the bottom of the primary reheater drain collecting mother pipe; the secondary reheater system is connected to the water supply system through the normal drain electric door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting mother pipe.

[0049] Preferably, the primary steam system is connected to the pressure system through the primary and secondary doors for local water discharge at the bottom of the water-cooled wall; the primary reheater system is connected to the pressure system through the manual door for high-level water discharge of the primary reheater drain station at the bottom of the primary reheater drain collecting mother pipe; the secondary reheater system is connected to the pressure system through the manual door for high-level water discharge of the secondary reheater drain station at the bottom of the secondary reheater drain collecting mother pipe.

[0050] In this embodiment, the boiler water pressure relief system is cleverly connected to multiple systems that need water supply and pressure relief, including the primary steam system, the primary reheater system and the secondary reheater system. Specifically, the primary steam system is connected to the water supply system through the water wall front and rear wall inlet header drain pipes to receive pre-treated water from the condensate tank; the primary reheater system and the secondary reheater system are respectively connected to the water supply system through the primary reheater drain station normal water discharge electric door at the bottom of the primary reheater drain collection mother pipe and the secondary reheater drain station normal water discharge electric door at the bottom of the secondary reheater drain collection mother pipe, and also receive the treated water in the condensate tank for water supply operations. After the water supply is completed, these systems are connected to the pressure test system through different drain gates: the primary steam system is connected to the pressure test system through the primary and secondary drain gates at the bottom of the water wall, the primary reheater system is connected to the pressure test system through the manual drain gate at the high position of the primary reheater drain station, and the secondary reheater system is connected to the pressure test system through the manual drain gate at the high position of the secondary reheater drain station, so as to carry out water pressure test when necessary. This design ensures that each system can be quickly and effectively converted to the pressure test state after the water supply operation is completed, which improves the flexibility and test efficiency of the overall system.

[0051] The invention improves the flexibility and efficiency of testing by cleverly connecting multiple boiler systems with the water supply and pressure testing systems; the modification of the existing boiler system is small and the implementation cost is low.

[0052] According to one embodiment of the present invention, the ammonia dosing room is connected to the condensate water tank via a gear pump.

[0053] Preferably, the water supply system comprises a pipe flushing line for flushing the inside of a newly installed pipe.

[0054] In this embodiment, the ammonia dosing room is connected to the condensate tank through an efficient gear pump. This design enables the ammonia solution to be accurately and stably injected into the condensate tank to meet the needs of boiler water quality regulation. At the same time, in order to ensure the cleanliness and safety of the system operation, the water supply system is specially equipped with a pipeline flushing pipeline. The flushing pipeline is specifically used to thoroughly flush the inside of the newly installed pipeline to remove possible impurities, dirt, etc., to ensure that the entire water supply system is in the best condition before it is put into formal use.

[0055] The present invention not only improves the efficiency and accuracy of water quality treatment in the condensate tank, but also further enhances the overall operational safety and stability of the boiler system.

[0056] The operation process of the present invention is as follows:

[0057] 1. Sheung Shui

[0058] The condensate tank is replenished with water (usually desalted water is used), and a gear pump is used to lead the pipeline from the ammonia dosing room into the condensate tank. The upper water pump forced circulation system mixes the water inside the condensate tank, and the water can be heated by auxiliary steam (auxiliary steam is added when the water temperature is ≤20℃). During this period, the water quality is monitored through the chemical sampling door.

[0059] After the water quality is qualified, put it into the water supply system to flush the pipes and flush the inside of the newly installed pipes.

[0060] After the newly installed pipeline is flushed, open the valve of the water supply system and feed the qualified desalted water through the water supply system. Since each water supply pipeline is controlled by a valve, different systems can be switched for water supply (the primary steam system can be fed with water through the inlet header drain pipes on the front and rear walls of the water-cooled wall; the primary reheater system can be fed with water through the normal discharge electric door of the primary reheater drain station at the bottom of the primary reheater drain collecting mother pipe; the secondary reheater system can be fed with water through the normal discharge electric door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting mother pipe).

[0061] 2. Suppression

[0062] After the water supply to the pressure-bearing parts of the boiler heating surface is completed, the water supply system is isolated and shut down, and the pressure test system is put into operation. Since the water source of the pressure test system is consistent with that of the water supply system, there is no need to repeat the water distribution work. After the pressure test pipeline is connected to the corresponding formal system pipeline, the pressure test work can be completed (the pressure test of the primary steam system can be increased by draining water from the first and second doors at the bottom of the water-cooled wall; the pressure test of the primary reheater system can be increased by the manual high-level drain door of the primary reheater drain station at the bottom of the primary reheater drain collecting mother pipe; the pressure test of the secondary reheater system can be increased by the manual high-level drain door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting mother pipe).

[0063] The present invention has revolutionized the traditional boiler water pressure test method, making the water pressure test no longer limited to the various types of water pumps in the formal system. Specifically, after the pressure-bearing components of the boiler have been overhauled, the present invention can immediately start an independent water pressure test process without waiting for the overhaul progress of other equipment in the formal system. This innovation not only verifies the quality of the overhaul in advance, but also effectively reveals hidden defects that may be missed during the overhaul process, thereby ensuring the comprehensiveness and accuracy of the overhaul work. More importantly, the present invention greatly guarantees the smooth progress of the overhaul period, improves the controllability and efficiency of the overhaul work, and avoids the problem of delays in the construction period caused by the inability to put the equipment into operation in a timely manner.

[0064] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0065] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A boiler water pressure suppression system, characterized in that: include: Condensate tank, water supply pump forced circulation system, ammonia dosing room, water supply system and pressure relief system; The condensate tank is connected to the upper water pump forced circulation system and the ammonia dosing room respectively, and the supplementary water in the condensate tank is mixed evenly with the supplementary water from the ammonia dosing room through the upper water pump forced circulation system; One end of the water supply system is connected to the condensate tank, and the other end is connected to each system that needs water supply and pressure testing; One end of the pressure-pressurizing system is connected to the condensate tank, and the other end is respectively connected to each system that needs water supply and pressure-pressurizing.

2. The boiler water pressure suppression system according to claim 1, characterized in that: The boiler water pressure system also includes: an auxiliary steam mechanism, which is used to provide a heat source for the condensate tank.

3. The boiler water pressure suppression system according to claim 2, characterized in that: When the water temperature in the condensate tank is ≤20° C., the auxiliary steam mechanism heats the water in the condensate tank.

4. The boiler water pressure suppression system according to claim 1, characterized in that: The two ends of the upper water pump forced circulation system are respectively connected to the condensate tank and the condensate tank supplementary water source; The water supply pump forced circulation system comprises a water supply pump, a water supply recirculation manual door, and a mixed water manual door.

5. The boiler water pressure suppression system according to claim 4, characterized in that: A chemical sampling door is provided at the connection pipeline between the condensate water tank and the upper water pump, and the water quality in the condensate water tank is detected through the chemical sampling door.

6. The boiler water pressure suppression system according to claim 1, characterized in that: The ammonia water dosing room is connected to the condensate water tank through a gear pump.

7. The boiler water pressure suppression system according to claim 1, characterized in that: The systems that require water supply and pressure boosting include: a primary steam system, a primary reheater system and a secondary reheater system.

8. The boiler water pressure reduction system according to claim 7, characterized in that: The primary steam system is connected to the water supply system through the water wall front and rear wall inlet header drain pipes; The primary reheater system is connected to the water supply system through the normal water discharge electric door of the primary reheater drain station at the bottom of the primary reheater drain collecting main pipe; The secondary reheater system is connected to the water supply system through the normal water discharge electric door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting main pipe.

9. The boiler water pressure suppression system according to claim 7, characterized in that: The primary steam system is connected to the pressure relief system through the primary and secondary water discharge doors at the bottom of the water-cooled wall; The primary reheater system is connected to the pressure relief system through the primary reheater drain station high-level water discharge manual door at the bottom of the primary reheater drain collecting main pipe; The secondary reheater system is connected to the pressure relief system through a manual high-level drain door of the secondary reheater drain station at the bottom of the secondary reheater drain collecting main pipe.

10. The boiler water pressure suppression system according to claim 1, characterized in that: The water supply system includes a pipeline flushing pipeline for flushing the inside of a newly installed pipeline.

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