Closed water system

Abstract

The utility model provides a closed water system. The closed water system comprises a closed water tank; liquid is stored in the water seal container; one end of the overflow pipeline is communicated with the closed water tank, and the other end is communicated with the water seal container; one end of the drainage pipeline is communicated with the closed water tank, and the side surface is communicated with high-temperature equipment. The technical problem that the temperature of liquid in the closed water tank rises can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of thermal power generation, especially relates to a closed water system. BACKGROUND

[0002] In thermal power generation enterprises, closed water is widely used in important equipment in the cooling power plant, such as EH oil cooler, small machine front pump bearing cooling, in-furnace sampler cooling, sealing oil cooler, condenser pump bearing cooling, etc. These devices will generate a large amount of heat in the running process, which needs to be maintained by cooling water to maintain its normal operating temperature.

[0003] The overflow pipeline 3 of the closed water tank of the #5 and #6 units of the third phase of our company shares a pipeline with the condenser 5 (see Figure 1 ). When the #5 and #6 units are started or the manual drain door is not tight, the steam with higher temperature will return to the closed water tank from the overflow pipeline, causing the temperature of the closed water tank to rise, thereby affecting the heat exchange of the closed water, and in more serious cases, it will cause the closed water level to be out of point, thereby causing the closed water pump to trip, seriously affecting the safe and stable operation of the unit. INVENTION CONTENTS

[0004] The utility model provides a closed water system, which can solve the technical problem of temperature rise of liquid in the closed water tank. It comprises:

[0005] a closed water tank;

[0006] a water seal container storing liquid therein;

[0007] an overflow pipeline, one end of which is communicated with the closed water tank, and the other end of which is communicated with the water seal container;

[0008] a drain pipeline, one end of which is communicated with the closed water tank, and the side surface of which is communicated with a high-temperature equipment.

[0009] Optionally, a liquid level sensor is arranged in the water seal container, which is used for sensing the liquid level in the water seal container.

[0010] Optionally, the closed water system further comprises a first water supply pipeline, which is used for adding water to the water seal container.

[0011] Optionally, a first electric control valve is arranged on the first water supply pipeline, the liquid level sensor in the water seal container comprises a first liquid level sensor and a second liquid level sensor, the first liquid level sensor is used for opening the first electric control valve when it senses that the liquid level in the water seal container is lower than a first liquid level threshold, and the second liquid level sensor is used for closing the first electric control valve when it senses that the liquid level in the water seal container is higher than the second liquid level sensor.

[0012] Optionally, the first water supply pipeline further comprises a first manual shutoff valve.

[0013] Optionally, the height of the connection point of the drain pipeline and the water seal container is higher than the height of the other end of the overflow pipeline located in the water seal container.

[0014] Optionally, the height of the second liquid level sensor is less than or equal to the height of the connection point of the drain pipeline and the water seal container.

[0015] Optionally, the water seal container further comprises a temperature sensor for sensing the temperature in the overflow pipeline.

[0016] Optionally, the water seal container further comprises a second water supply pipeline provided with a second electrically controlled valve; the temperature sensor in the water seal container comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is configured to open the second electrically controlled valve when the temperature in the water seal container is sensed to be higher than a first temperature threshold; and the second temperature sensor is configured to close the second electrically controlled valve when the temperature in the water seal container is sensed to be lower than a second temperature threshold.

[0017] Optionally, the second water supply pipeline further comprises a second manual shutoff valve. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 A structural schematic diagram of a closed water system provided by the related art;

[0020] Figure 2 A structural schematic diagram of a closed water system provided by the present application.

[0021] The reference signs are as follows:

[0022] 1: closed water tank; 11: water inlet; 12: water outlet;

[0023] 2: water seal container;

[0024] 3: overflow pipeline;

[0025] 4: drain pipeline;

[0026] 5: high-temperature equipment;

[0027] 6: first water supply pipeline; 61: first electrically controlled valve; 62: first manual shutoff valve;

[0028] 7: second water supply pipeline; 71: second electrically controlled valve; 72: second manual shutoff valve;

[0029] 81: first liquid level sensor; 82: second liquid level sensor;

[0030] 91: first temperature sensor; 92: second temperature sensor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0032] Figure 2 The utility model provides a closed water system's structural schematic diagram. Referring to Figure 2 , comprising:

[0033] Closed water tank 1;

[0034] Water seal container 2, which stores liquid;

[0035] Overflow pipeline 3, one end is communicated with closed water tank 1, and the other end is communicated with water seal container 2;

[0036] Drain pipeline 4, one end is communicated with closed water tank 1, and side surface is communicated with high temperature equipment 5.

[0037] In the embodiment, by setting water seal container and drain pipeline, the liquid in closed water tank flows into water seal container through residual pipeline, then flows out through drain pipeline, and when high temperature steam flows in drain pipeline, is influenced by water seal container, cannot be transmitted to closed water tank, can avoid that high temperature steam causes the temperature of water in closed water tank to rise.

[0038] In the embodiment, closed water tank 11 includes water inlet 11 and water outlet 12.

[0039] In the embodiment, water seal container 2 is provided with liquid level sensor, for sensing the liquid level in water seal container.

[0040] In the embodiment, high temperature equipment 5 is condenser.

[0041] In the embodiment, the closed water system further includes first water supply pipeline 6, and the first water supply pipeline 6 is used to add water in water seal container.

[0042] In the embodiment, the first water supply pipeline 6 is provided with a first electrically controlled valve 61, the liquid level sensor in the water seal container 2 comprises a first liquid level sensor 81 and a second liquid level sensor 82, the first liquid level sensor 81 is used to open the first electrically controlled valve 61 when it is sensed that the liquid level in the water seal container 2 is lower than a first liquid level threshold, and the second liquid level sensor 82 is used to close the first electrically controlled valve 61 when it is sensed that the liquid level in the water seal container is higher than a second liquid level threshold.

[0043] In the embodiment, the first electrically controlled valve 61 is a solenoid valve.

[0044] In the embodiment, the first water supply pipeline 6 further comprises a first manually closed valve 62.

[0045] In the embodiment, the height of the connecting point of the water drain pipeline 4 and the water seal container 2 is higher than the height of the other end of the overflow pipe 3 in the water seal container 2.

[0046] In the embodiment, the height of the second liquid level sensor 82 is less than or equal to the height of the connecting point of the water drain pipeline 4 and the water seal container 2.

[0047] In the embodiment, the water seal container 2 further comprises a temperature sensor for sensing the temperature in the overflow pipe 3.

[0048] In the embodiment, the water seal container 2 further comprises a second water supply pipeline 7, the second water supply pipeline 7 is provided with a second electrically controlled valve 71; the temperature sensor in the water seal container 2 comprises a first temperature sensor 91 and a second temperature sensor 92, the first temperature sensor 91 is used to open the second electrically controlled valve 71 when it is sensed that the temperature in the water seal container 2 is higher than a first temperature threshold, and the second temperature sensor 92 is used to close the second electrically controlled valve 71 when it is sensed that the temperature in the water seal container 2 is lower than a second temperature threshold.

[0049] In the embodiment, the second electrically controlled valve 71 is a solenoid valve.

[0050] In the embodiment, the second water supply pipeline further comprises a second manually closed valve 72.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A closed water system characterized in that, The application relates to a closed water system, comprising: a closed water tank; a water seal container storing liquid; an overflow pipeline, one end of which is connected with the closed water tank and the other end of which is connected with the water seal container; a drainage pipeline, one end of which is connected with the closed water tank and the side of which is connected with a high-temperature device.

2. The closed water system of claim 1, wherein, The water seal container is provided with a liquid level sensor for sensing the liquid level in the water seal container.

3. The closed water system of claim 2, wherein, The closed water system further comprises a first water supply pipeline for adding water to the water seal container.

4. The closed water system of claim 3, wherein, The first water supply pipeline is provided with a first electric control valve, the liquid level sensor in the water seal container comprises a first liquid level sensor and a second liquid level sensor, the first liquid level sensor is used for opening the first electric control valve when the liquid level in the water seal container is sensed to be lower than a first liquid level threshold, and the second liquid level sensor is used for closing the first electric control valve when the liquid level in the water seal container is sensed to be higher than a second liquid level threshold.

5. The closed water system of claim 4, wherein, The first water supply pipeline further comprises a first manual shutoff valve.

6. Closed water system according to any of claims 1 to 5, characterized in that The height of the connection point of the drainage pipeline and the water seal container is higher than the height of the other end of the overflow pipeline in the water seal container.

7. The closed water system of claim 6, wherein The height of the second liquid level sensor is less than or equal to the height of the connection point of the drainage pipeline and the water seal container.

8. The closed water system of claim 7, wherein, The water seal container further comprises a temperature sensor for sensing the temperature in the overflow pipeline.

9. The closed water system of claim 8, wherein, The water seal container further comprises a second water supply pipeline, the second water supply pipeline is provided with a second electric control valve, the temperature sensor in the water seal container comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is used for opening the second electric control valve when the temperature in the water seal container is sensed to be higher than a first temperature threshold, and the second temperature sensor is used for closing the second electric control valve when the temperature in the water seal container is sensed to be lower than a second temperature threshold.

10. The closed water system of claim 9, wherein, The second water supply pipeline further comprises a second manual shutoff valve.

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