Water supply oxygenation conversion and steady-state oxygenation device

Abstract

The utility model discloses a water supply and oxygenation conversion and steady-state oxygen supplementation device which comprises an oxygen source, a desalted water supply main pipe, a condensate pump, an oxygen supplementation main valve, an oxygen supplementation main pipe, an oxygenation point and an oxygen source. An outlet of the demineralized water supply main pipe is divided into two paths, the first path is communicated with a condensate pump through a condenser water supplementing valve and a condenser in sequence, the second path is communicated with an inlet of an oxygen supplementing main valve, an outlet of the oxygen supplementing main valve is communicated with an oxygen supplementing main pipe, and the oxygen supplementing main pipe is communicated with the condensate pump through a condensate oxygen supplementing valve. The oxygenating main pipe is communicated with an oxygenating point through a water supply oxygenating valve in sequence; an outlet of the oxygen source is communicated with an inlet pipeline of the condensed water oxygen supplementing valve, an outlet of the oxygen source is communicated with an inlet of the water supply oxygen supplementing valve, and the device can add oxygen safely and reliably.

Description

Technical Field

[0001] This utility model belongs to the field of water supply oxygenation technology, and relates to a water supply oxygenation conversion and steady-state oxygen supplementation device. Background Technology

[0002] As one of the advanced feedwater treatment processes for DC units, oxygenation of feedwater can form a dense oxide protective layer on the inner wall of the pipe, thereby effectively reducing the corrosion and scaling rate of thermal equipment, reducing the frequency of chemical cleaning, extending the fine treatment cycle, saving power plant operation and maintenance costs, and improving the economic efficiency of the power plant.

[0003] The most common methods for oxygenating feedwater are pure oxygen, air, and oxygen-enriched water. When system pressure fluctuates, gaseous oxygen such as pure oxygen or air is compressed within the oxygenation pipeline, causing fluctuations in the oxygen injection rate. This makes precise control of the oxygenation rate difficult, leading to unstable feedwater oxygenation and potentially exceeding the acceptable oxygen content. Liquid oxygen-enriched water, being incompressible, provides a relatively stable oxygenation rate compared to gaseous oxygen when system pressure changes cause pressure variations at the oxygenation point. However, the high concentration of dissolved oxygen in oxygen-enriched water means that even small fluctuations in flow rate can cause oxygen levels to exceed permissible limits, especially when the unit needs to maintain a low oxygen content. Current methods of oxygenation using pure oxygen or oxygen-enriched water can lead to excessive oxygen levels in the feedwater due to changes in unit load or the instability of the system's operation and control. This is especially true under low-oxygen operating conditions, where unexpected fluctuations can cause the feedwater oxygen levels to exceed the standard by tens of times. Excess oxygen entering the system may bring unforeseen risks, which are incompatible with the safety concept of nuclear power units. Therefore, a relatively safer and more reliable oxygenation method is needed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a water supply oxygenation conversion and steady-state oxygenation device that can safely and reliably add oxygen.

[0005] To achieve the above objectives, this utility model discloses a water supply oxygenation and steady-state oxygenation device, including an oxygen source, a demineralized water supply main pipe, a condensate pump, an oxygenation main valve, an oxygenation main pipe, an oxygenation point, and an oxygen source.

[0006] The outlet of the demineralized water supply main pipe is divided into two routes. The first route is connected to the condensate pump via the condenser water supply valve and the condenser. The second route is connected to the inlet of the oxygen supply main valve. The outlet of the oxygen supply main valve is connected to the oxygen supply main pipe. The oxygen supply main pipe is connected to the condensate pump via the condensate oxygen supply valve. The oxygen supply main pipe is connected to the oxygen supply point via the feedwater oxygen supply valve.

[0007] The outlet of the oxygen source is connected to the inlet pipe of the condensate oxygenation valve, and the outlet of the oxygen source is connected to the inlet of the feedwater oxygenation valve.

[0008] A further improvement of the water supply oxygenation conversion and steady-state oxygenation device of this utility model is that:

[0009] Furthermore, the outlet of the main oxygen supply valve is connected to the oxygen supply main pipe via a pressure sensor.

[0010] Furthermore, the oxygen supply main pipe is connected to the condensate pump via a condensate oxygen supply valve, a condensate oxygen supply pressure gauge, a condensate oxygen supply flow meter, a condensate oxygen supply automatic regulating valve, and a condensate oxygen supply isolation valve.

[0011] Furthermore, the condensate oxygenation valve is connected in parallel to a condensate oxygenation pump.

[0012] Furthermore, the condensate oxygenation automatic regulating valve is connected in parallel with the condensate oxygenation manual regulating valve.

[0013] Furthermore, the oxygen supply main pipe is connected to the oxygen supply point in sequence via the water supply oxygen supply valve, the first oxygen supply pump, the water supply oxygen supply automatic regulating valve, the water supply oxygen supply pressure gauge, the water supply oxygen supply pressure sensor, the water supply oxygen supply flow meter, and the water supply oxygen supply isolation valve.

[0014] Furthermore, the first oxygen pump is connected in parallel with a second oxygen pump and an oxygen pump recirculation valve.

[0015] Furthermore, the automatic water supply and oxygenation regulating valve is connected in parallel with a manual water supply and oxygenation regulating valve.

[0016] Furthermore, the outlet of the oxygen source is connected to the inlet pipe of the condensate oxygenation backup port isolation valve and the condensate oxygenation valve.

[0017] Furthermore, the outlet of the oxygen source is connected to the inlet of the feedwater oxygenation valve via the isolation valve of the main feedwater oxygenation standby port.

[0018] This utility model has the following beneficial effects:

[0019] In specific operation, the water supply oxygenation conversion and steady-state oxygen replenishment device described in this utility model utilizes the natural dissolved oxygen in the demineralized water to replenish oxygen and meet the normal oxygen consumption of the unit. In addition, since the dissolved oxygen concentration in the demineralized water is relatively low during the unit's oxygenation conversion stage, the unit's oxygenation conversion speed is slow. Therefore, an oxygen source is added to supplement oxygen and achieve safe and reliable oxygenation. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a structural diagram of the present invention.

[0022] Among them, 01 is the demineralized water supply header, 02 is the condenser makeup water valve, 03 is the condenser, 04 is the condensate pump, 10 is the condensate oxygenation valve, 11 is the condensate oxygenation pump, 12 is the condensate oxygenation pressure gauge, 13 is the condensate oxygenation flow meter, 14 is the condensate oxygenation automatic regulating valve, 15 is the condensate oxygenation manual regulating valve, 16 is the condensate oxygenation isolation valve, 20 is the feedwater oxygenation valve, 21 is the first oxygenation pump, and 22 is the second oxygenation pump. 23 is the oxygen replenishment pump recirculation valve; 24 is the feedwater oxygen replenishment automatic regulating valve; 25 is the feedwater oxygen replenishment manual regulating valve; 26 is the feedwater oxygen replenishment pressure gauge; 27 is the feedwater oxygen replenishment pressure sensor; 28 is the feedwater oxygen replenishment flow meter; 29 is the feedwater oxygen replenishment isolation valve; 30 is the oxygen supply point; 40 is the oxygen source; 41 is the condensate oxygen replenishment standby port isolation valve; 42 is the main feedwater oxygen replenishment standby port isolation valve; 50 is the main oxygen replenishment valve; and 51 is the oxygen replenishment header pressure sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0027] It should be understood that although terms such as first, second, third, etc., may be used to describe preset ranges in the embodiments of this utility model, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of this utility model, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0028] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0031] refer to Figure 1 The feedwater oxygenation and steady-state oxygenation device of this utility model includes a demineralized water supply main pipe 01, a condenser water supply valve 02, a condenser 03, a condensate pump 04, a condensate oxygenation valve 10, a condensate oxygenation pump 11, a condensate oxygenation pressure gauge 12, a condensate oxygenation flow meter 13, an automatic condensate oxygenation regulating valve 14, a manual condensate oxygenation regulating valve 15, a condensate oxygenation isolation valve 16, a feedwater oxygenation valve 20, and a first oxygenation pump. 21. Second oxygenation pump; 22. Oxygenation pump recirculation valve; 23. Automatic oxygenation regulating valve for feedwater; 24. Manual oxygenation regulating valve for feedwater; 25. Oxygenation pressure gauge for feedwater; 26. Oxygenation pressure sensor for feedwater; 27. Oxygenation flow meter for feedwater; 28. Oxygenation isolation valve for feedwater; 29. ​​Oxygenation point; 30. Oxygen source; 40. Isolation valve for condensate oxygenation standby port; 41. Isolation valve for main feedwater oxygenation standby port; 42. Main oxygenation valve; 50. Oxygenation header pressure sensor; 51.

[0032] The outlet of the demineralized water supply main pipe 01 is divided into two paths. The first path connects to the condensate pump 04 via the condenser makeup water valve 02, the condenser 03, and the main oxygen supply valve 50. The outlet of the main oxygen supply valve 50 is connected to the oxygen supply main pipe via the oxygen supply main pipe pressure sensor 51. The oxygen supply main pipe is connected to the condensate pump 04 via the condensate oxygen supply valve 10, the condensate oxygen supply pressure gauge 12, the condensate oxygen supply flow meter 13, the condensate oxygen supply automatic regulating valve 14, and the condensate oxygen supply isolation valve 16. The condensate oxygen supply valve 10 is connected in parallel to the condensate oxygen supply pump 11; the condensate oxygen supply automatic regulating valve 14 is connected in parallel to the condensate oxygen supply manual regulating valve 15.

[0033] The oxygen supply main pipe is connected to the oxygenation point 30 via the water supply oxygenation valve 20, the first oxygenation pump 21, the water supply oxygenation automatic regulating valve 24, the water supply oxygenation pressure gauge 26, the water supply oxygenation pressure sensor 27, the water supply oxygenation flow meter 28, and the water supply oxygenation isolation valve 29. The first oxygenation pump 21 is connected in parallel to the second oxygenation pump 22 and the oxygenation pump recirculation valve 23. The water supply oxygenation automatic regulating valve 24 is connected in parallel to the water supply oxygenation manual regulating valve 25.

[0034] This embodiment also includes an oxygen source 40. The outlet of the oxygen source 40 is connected to the inlet pipe of the condensate oxygenation backup port isolation valve 41 and the condensate oxygenation valve 10. The outlet of the oxygen source 40 is connected to the inlet of the feedwater oxygenation valve 20 via the main feedwater oxygenation backup port isolation valve 42.

[0035] It should be noted that the upstream pipes and valves of the first oxygen pump 21 and the second oxygen pump 22 are selected with a pressure rating of 1.6MPa, and the downstream pipes, valves, instruments, etc. are selected with a pressure rating of 2.5MPa.

[0036] The working process of this utility model is as follows:

[0037] The demineralized water output from the demineralized water supply main pipe 01 is divided into two paths. One path enters the condensate pump 04 through the condenser water supply valve 02 and the condenser 03 in sequence. The other path enters the oxygen supply main pipe through the oxygen supply main valve 50. The demineralized water in the oxygen supply main pipe is divided into two paths. One path enters the condensate pump 04 after being oxygenated by the oxygen source. The other path enters the oxygenation point 30 after being oxygenated by the oxygen source.

[0038] It should be noted that this invention uses dissolved oxygen from the demineralized water in the unit as the oxygen source. The actual dissolved oxygen in the demineralized water exceeds 8000 ppb, which can increase the dissolved oxygen in the system water by 40-120 ppb, fully meeting the requirements of the unit's oxidation operation. Based on the above, the demineralized water makeup water of the unit is used as the oxygen carrier. Demineralized water containing dissolved oxygen is added to the inlet header of the condensate pump 04 and the inlet downcomer of the feedwater pump. This satisfies both the system's makeup water requirements and the unit's oxidation operation requirements. During the oxygenation conversion stage, the conversion speed is improved in two ways: first, the pump is used to increase the flow rate of the demineralized water, and the pump can also serve as a backup during normal unit operation; second, an oxygen source 40 is connected to the pump inlet through a temporary interface to increase the oxygen content in the water, thereby improving the unit's oxygenation conversion efficiency.

[0039] Other embodiments of this utility model will readily conceive of by those skilled in the art upon consideration of the specification and disclosure thereof. This application is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this utility model are indicated by the following claims.

[0040] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A water oxygenation and steady-state oxygen supplementation device, comprising: The system comprises a desalted water supply main pipe (01), a condensate pump (04), an oxygen supplementing main valve (50), an oxygen supplementing main pipe, an oxygen supplementing point (30) and an oxygen source (40); The outlet of the desalted water supply main pipe (01) is divided into two paths, wherein the first path is connected with the condensate pump (04) through a condenser water supply valve (02) and a condenser (03) in sequence, and the second path is connected with the inlet of the oxygen supplementing main valve (50), the outlet of the oxygen supplementing main valve (50) is connected with the oxygen supplementing main pipe, the oxygen supplementing main pipe is connected with the condensate pump (04) through a condensate oxygen supplementing valve (10), and the oxygen supplementing main pipe is connected with the oxygen supplementing point (30) through a feed water oxygen supplementing valve (20) and an oxygen supplementing point (30) in sequence; The outlet of the oxygen source (40) is connected with the inlet pipeline of the condensate oxygen supplementing valve (10), and the outlet of the oxygen source (40) is connected with the inlet of the feed water oxygen supplementing valve (20).

2. The apparatus for water oxygenation and steady-state oxygen supplementation according to claim 1, wherein The outlet of the oxygen supplementing main valve (50) is connected with the oxygen supplementing main pipe through an oxygen supplementing main pipe pressure sensor (51).

3. The apparatus for water oxygenation and steady-state oxygen supplementation of claim 1, wherein, The oxygen supplementing main pipe is connected with the condensate pump (04) through a condensate oxygen supplementing valve (10), a condensate oxygen supplementing pressure gauge (12), a condensate oxygen supplementing flowmeter (13), a condensate oxygen supplementing automatic regulating valve (14) and a condensate oxygen supplementing isolation valve (16) in sequence.

4. The apparatus for water oxygenation and steady-state oxygen supplementation according to claim 3, wherein The condensate oxygen supplementing valve (10) is connected with a condensate oxygen supplementing pump (11) in parallel.

5. The apparatus for water oxygenation and steady-state oxygen supplementation of claim 3, wherein, The condensate oxygen supplementing automatic regulating valve (14) is connected with a condensate oxygen supplementing manual regulating valve (15) in parallel.

6. The water oxygenation and steady state oxygen supplementation device of claim 1, wherein, The oxygen supplementing main pipe is connected with the oxygen supplementing point (30) through a feed water oxygen supplementing valve (20), a first oxygen supplementing pump (21), a feed water oxygen supplementing automatic regulating valve (24), a feed water oxygen supplementing pressure gauge (26), a feed water oxygen supplementing pressure sensor (27), a feed water oxygen supplementing flowmeter (28) and a feed water oxygen supplementing isolation valve (29) in sequence.

7. The apparatus for water oxygenation and steady-state oxygen supplementation of claim 6, wherein, The first oxygen supplementing pump (21) is connected with a second oxygen supplementing pump (22) and an oxygen supplementing pump recirculation valve (23) in parallel.

8. The water oxygenation and steady state oxygen supplementation device of claim 6, wherein, The feed water oxygen supplementing automatic regulating valve (24) is connected with a feed water oxygen supplementing manual regulating valve (25) in parallel.

9. The apparatus for water oxygenation and steady-state oxygen supplementation of claim 1, wherein, The outlet of the oxygen source (40) is connected with the inlet pipeline of the condensate oxygen supplementing valve (10) through a condensate oxygen supplementing standby port isolation valve (41).

10. The apparatus for water oxygenation and steady-state oxygen supplementation of claim 1, wherein, The outlet of the oxygen source (40) is connected with the inlet of the feed water oxygen supplementing valve (20) through a main feed water oxygen supplementing standby port isolation valve (42).

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