Water sample backwater device for measuring dissolved hydrogen in stator cooling water of generator

Abstract

The utility model discloses a generator stator cooling water dissolved hydrogen measurement water sample backwater device which comprises a middle water storage tank, the top of the middle water storage tank is communicated with a monitoring device through a water inlet pipeline, and the lower end of the middle water storage tank is communicated with a generator stator cooling water tank through a double-pump system; a low-liquid-level sensor, a high-liquid-level sensor and a high-liquid-level sensor are arranged on one side in the middle water storage tank and used for monitoring the liquid level of the middle water storage tank; the device relates to the technical field of measurement water sample recovery, and is simple in structure, easy in function and high in reliability, meanwhile, the measured water sample is directly recovered to a generator stator cooling water tank, the water quality of generator stator cooling water is not affected, leakage and leakage are avoided, water resources are saved, and the device is suitable for popularization and application. Meanwhile, safe operation of generator stator cooling water is guaranteed, and different generator stator cooling water tank forms on site are met.

Description

Technical Field

[0001] This utility model belongs to the field of water sample recovery technology, specifically a device for measuring dissolved hydrogen in generator cooling water and returning water samples. Background Technology

[0002] In the experiment of measuring dissolved hydrogen in generator cooling water, after the monitoring device measures the water sample, the destination of the water sample generally falls into the following categories:

[0003] (1) After the water sample is measured, it is directly discharged into the ditch. The disadvantage of this method is that it wastes pure water and causes the water level in the tank to drop. If the water is not replenished in time, it may cause the unit to stop unexpectedly.

[0004] (2) If the monitoring equipment is higher than the generator cooling water tank, the water sample after measurement is not easy to flow back to the tank. When the cooling water tank is replenished, the gas and water sample in the tank will be sprayed onto the monitoring equipment and the ground through the recovery pipe.

[0005] (3) The monitoring equipment is lower than the generator's cooling water tank, and the drainage from the monitoring equipment cannot return to the tank by relying on the height difference.

[0006] (4) The water sample measured by the monitoring device is directly pumped into the constant cooling water tank. This method makes it difficult to control the pump flow rate. When the pump flow rate is less than the drainage flow rate of the monitoring device, the monitoring device will leak. When the pump flow rate is greater than the drainage flow rate of the monitoring device, a large amount of air will enter the constant cooling water tank. The carbon dioxide in the air will seriously affect the water quality of the constant cooling water and cause corrosion of the generator rods.

[0007] In summary, there is an urgent need for a generator-cooled water dissolved hydrogen measurement water sample return device to realize water sample recovery. Utility Model Content

[0008] The purpose of this invention is to provide a device for measuring dissolved hydrogen in generator cooling water and returning water samples to solve the problems mentioned in the background art.

[0009] The technical solution adopted in this utility model is as follows:

[0010] A generator cooling water dissolved hydrogen measurement water sample return device includes an intermediate water tank. The top of the intermediate water tank is connected to a monitoring device through a water inlet pipe, and the lower end of the intermediate water tank is connected to the generator cooling water tank through a dual pump system.

[0011] The intermediate water tank is equipped with a low liquid level sensor, a high liquid level sensor, and a very high liquid level sensor on one side to monitor the liquid level in the intermediate water tank; the low liquid level sensor, the high liquid level sensor, and the very high liquid level sensor are all connected to the controller.

[0012] Preferably, the dual-pump system includes a first-speed regulating pump and a second-speed regulating pump connected in parallel. The two ends of the first-speed regulating pump and the second-speed regulating pump are connected by two tee valves respectively. The inlet of the first tee valve is connected to the outlet at the bottom of the intermediate water storage tank, and the outlet of the second tee valve is connected to the generator constant cooling water tank through a conveying pipeline.

[0013] Preferably, both the No. 1 speed-regulating pump and the No. 2 speed-regulating pump are connected to the controller.

[0014] Preferably, a filter is provided at the outlet at the bottom of the intermediate water storage tank, and a one-way valve is provided on the delivery pipeline.

[0015] Preferably, the top of the intermediate water storage tank is provided with an overflow port, which is connected to a floor drain.

[0016] Preferably, the controller is connected to the power plant's DCS, and when a high-high liquid level alarm occurs, the DCS displays the high-high liquid level alarm.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] This invention features a simple structure, easy-to-use functions, and high reliability. Furthermore, the measured water sample is directly recycled to the generator's cooling water tank, without affecting the quality of the generator's cooling water, avoiding leaks, saving water resources, ensuring the safe operation of the generator's cooling water, and meeting the needs of different generator cooling water tank types on site. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] In the diagram: 1. Controller; 2. Monitoring device; 3. Generator cooling water tank; 4. Intermediate water storage tank; 5. Filter; 6. Floor drain; 7. No. 1 speed regulating pump; 8. No. 2 speed regulating pump; 9. Inlet pipe; 10. Low level sensor; 11. High level sensor; 12. High-high level sensor; 13. Check valve; 14. Delivery pipe. Detailed Implementation

[0021] The specific embodiments of this utility model are described in detail below.

[0022] The "range" disclosed in this utility model is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10–50 is listed for a specific parameter, it is also expected that ranges of 10–40 and 20–50 are also included. Furthermore, if the minimum range values ​​are listed as 1 and 2, and the maximum range values ​​are listed as 3, 4, and 5, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0–5" means that all real numbers between "0–5" have been listed herein; "0–5" is merely a shortened representation of these numerical combinations.

[0023] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0024] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0025] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0026] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0027] Unless otherwise specified, the reaction will proceed under normal temperature and pressure conditions.

[0028] Unless otherwise specified, all parts or percentages are by weight or by weight percentage.

[0029] In this invention, all the substances used are known substances that can be purchased or synthesized by known methods.

[0030] In this invention, all the devices or equipment used are conventional devices or equipment known in the art and are readily available.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example:

[0033] A device for measuring dissolved hydrogen in generator cooling water and returning water samples, such as... Figure 1 As shown, it includes an intermediate water storage tank 4. The top of the intermediate water storage tank 4 is connected to the monitoring device 2 through a water inlet pipe 9, and the lower end of the intermediate water storage tank 4 is connected to the generator constant cooling water tank 3 through a dual pump system.

[0034] A low level sensor 10, a high level sensor 11, and a high-high level sensor 12 are installed on one side of the intermediate water tank 4 to monitor the liquid level of the intermediate water tank 4; the low level sensor 10, the high level sensor 11, and the high-high level sensor 12 are all connected to the controller 1.

[0035] In one possible implementation, the dual-pump system includes a first-speed regulating pump 7 and a second-speed regulating pump 8 connected in parallel. The two ends of the first-speed regulating pump 7 and the second-speed regulating pump 8 are connected by two tees respectively. The inlet of the first tee is connected to the outlet at the bottom of the intermediate water storage tank 4, and the outlet of the second tee is connected to the generator constant cooling water tank 3 through a delivery pipe 14.

[0036] In one possible implementation, both the first speed-regulating pump 7 and the second speed-regulating pump 8 are connected to the controller 1.

[0037] In one possible implementation, a filter 5 is provided at the outlet at the bottom of the intermediate water tank 4, and a one-way valve 13 is provided on the delivery pipe 14.

[0038] In one possible implementation, the top of the intermediate water tank 4 is provided with an overflow port, which is connected to the floor drain 6.

[0039] In one possible implementation, controller 1 is connected to the power plant's DCS, and when a high-high liquid level alarm occurs, the DCS displays the high-high liquid level alarm.

[0040] In one possible implementation, it includes:

[0041] (1) Add an intermediate water storage tank 4 next to the monitoring equipment to collect water samples after the monitoring equipment has measured the water.

[0042] (2) Three liquid level sensors are installed on the intermediate water storage tank 4, namely low liquid level, high liquid level and high-high liquid level sensors to monitor the liquid level. The liquid level sensors are connected to the controller.

[0043] (3) An inlet pipe 9 is installed on the intermediate water storage tank 4 to connect the water sample after the monitoring equipment has measured it, so that the water sample flows back to the intermediate water storage tank 4.

[0044] (4) An exhaust and overflow pipe is installed on the intermediate water storage tank 4 for exhaust and overflow of the intermediate water storage tank 4, and overflow into the ditch.

[0045] (5) A water sample filter 5 is connected to a drainage interface at the bottom of the intermediate water storage tank 4, and a three-way connector is connected after the filter 5.

[0046] (6) Two speed-regulating pumps are connected to the three-way connector respectively. The two speed-regulating pumps are connected in parallel. A three-way connector is connected to the outlet of the two speed-regulating pumps. A one-way valve 13 is connected to the back of the three-way connector. A water sample conveying pipe 14 is connected to the back of the one-way valve 13. The conveying pipe 14 is connected to the generator constant cooling water tank 3 to convey the water sample to the generator constant cooling water tank 3.

[0047] (7) The control signals of the two speed-regulating pumps are connected to the controller 1, and the controller 1 controls the start and stop of the delivery pumps.

[0048] (8) The two speed-regulating pumps are used in one and standby. When a high liquid level alarm occurs, the other speed-regulating pump is activated.

[0049] (9) The controller is connected to the power plant’s DCS. When a high-high liquid level alarm occurs, the DCS will display the high-high alarm, which will facilitate the operators to go to the equipment site to find the cause and deal with the fault in a timely manner, and ensure the safe operation of the equipment.

[0050] By adopting the above technical solution:

[0051] Add an intermediate water storage tank to collect generator cooling water samples to prevent leaks.

[0052] Level sensors with different liquid levels are installed on the intermediate water storage tank to monitor the liquid level and control the speed regulating pump.

[0053] The system employs a dual-pump operation (one in use and one on standby) to ensure the reliability of the sample water recovery device.

[0054] The controller precisely controls the speed-regulating pump through a liquid level sensor, improving the safety of the sample water recovery device.

[0055] High liquid level alarm signals are uploaded to the DCS, allowing operators to perform maintenance in advance and improving the safe operation of the generator stator cooling water system.

[0056] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring dissolved hydrogen in generator cooling water and returning water samples, characterized in that: It comprises an intermediate water storage tank (4) which is connected with the monitoring device (2) through a water inlet pipe (9) at the top and is connected with the generator constant cold water tank (3) through a double pump system at the lower end. A low liquid level sensor (10), a high liquid level sensor (11) and a high-high liquid level sensor (12) are arranged on one side of the intermediate water storage tank (4) for monitoring the liquid level of the intermediate water storage tank (4); the low liquid level sensor (10), the high liquid level sensor (11) and the high-high liquid level sensor (12) are connected with the controller (1).

2. A generator water cooling system for measuring dissolved hydrogen in water samples, as claimed in claim 1, wherein: The double pump system comprises a first speed regulating pump (7) and a second speed regulating pump (8) connected in parallel, and the two ends of the first speed regulating pump (7) and the second speed regulating pump (8) are connected with two three-way valves respectively, the inlet of the first three-way valve is connected with the water outlet at the bottom of the intermediate water storage tank (4), and the outlet of the second three-way valve is connected with the generator constant cold water tank (3) through a conveying pipe (14).

3. A generator stator water cooling system, water sample dissolved hydrogen measurement and water return apparatus as claimed in claim 2, characterised in that: The first speed regulating pump (7) and the second speed regulating pump (8) are connected with the controller (1).

4. A generator stator water cooling system and water sample return apparatus as defined in claim 2 wherein: A filter (5) is arranged at the water outlet at the bottom of the intermediate water storage tank (4), and a one-way valve (13) is arranged on the conveying pipe (14).

5. A generator stator water cooling system, water sample dissolved hydrogen measurement and water return apparatus as defined in claim 1 wherein: An overflow port is arranged at the top of the intermediate water storage tank (4) and is connected with a floor drain (6).

6. A generator stator water cooling system for measuring dissolved hydrogen in water samples returned from a water treatment plant as recited in claim 1, wherein: The controller (1) is connected with the DCS of the power plant, and a high-high liquid level alarm is displayed on the DCS when the high-high liquid level alarm occurs.

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