Closed circulating water system buffer tank exhaust device

Abstract

The utility model relates to the technical field of closed circulating water system exhaust, in particular to a buffer tank exhaust device of a closed circulating water system, which comprises a circulating water buffer tank, a cooling tower, a vacuum buffer tank and a vacuum generator. A first treatment pipeline is fixedly communicated between the lower outlet of the circulating water buffer tank and the upper inlet of the cooling tower. The closed circulating water system is reasonable and compact in structure and convenient to use, realizes exhaust of the circulating water buffer tank through the added vacuum buffer tank, the vacuum generator and matched pipelines, effectively solves the problems that the load of the calcium carbide furnace needs to be reduced due to exhaust of the buffer tank of the existing closed circulating water system, and the operation of normal procedures is influenced, and has the characteristics of safety, low cost and the like. And the operation is simple.

Description

Technical Field

[0001] This utility model relates to the field of exhaust technology for closed-loop circulating water systems, and is an exhaust device for a buffer tank in a closed-loop circulating water system. Background Technology

[0002] The main function of a closed-loop circulating water system is to cool the furnace cover, furnace door, flue, and transformer areas of the calcium carbide furnace. Cooling these components is crucial for ensuring the stable and safe operation of the calcium carbide furnace. The setup and operating status of the circulating water system directly affect the efficiency and safety of the calcium carbide furnace.

[0003] In a closed-loop circulating water system, the circulating water buffer tank often operates under negative pressure. If the air is not vented for a long time, the vacuum in the circulating water buffer tank will be broken, and a large amount of water will overflow from the water collector installed in the closed-loop circulating water system in a short period of time, which poses a significant risk.

[0004] The existing venting operation requires two people to operate simultaneously: one to close the circulating pump outlet valve and the other to open the venting valve of the circulating water buffer tank. After venting is complete, the circulating pump outlet valve is reopened. During this operation, firstly, the circulating water supply pressure will drop significantly, falling below the cooling requirements of the calcium carbide furnace cover, furnace door, flue, and transformer; simultaneously, venting may cause water outages or vaporization in some water circuits such as the calcium carbide furnace flue, posing a significant safety risk; secondly, venting requires the calcium carbide furnace to reduce its load, affecting the unit's production capacity. Summary of the Invention

[0005] This utility model provides an exhaust device for a buffer tank in a closed-loop circulating water system, which overcomes the shortcomings of the prior art and can effectively solve the problem that the exhaust of the buffer tank in the existing closed-loop circulating water system requires load reduction of the calcium carbide furnace, affecting the normal operation of the process.

[0006] The technical solution of this utility model is achieved through the following measures: a closed-loop circulating water system buffer tank exhaust device, including a circulating water buffer tank, a cooling tower, a vacuum buffer tank, and a vacuum generator. The upper inlet of the circulating water buffer tank is fixedly connected to a softened water inlet pipeline, the lower outlet of the circulating water buffer tank is fixedly connected to the upper inlet of the cooling tower, the upper outlet of the cooling tower is fixedly connected to a softened water outlet pipeline, the upper inlet of the circulating water buffer tank is fixedly connected to a softened water circulation pipeline, the upper outlet of the circulating water buffer tank is fixedly connected to a first exhaust pipeline, the first exhaust pipeline is fixedly connected to the lower inlet of the vacuum buffer tank, the compressed air inlet of the vacuum generator is fixedly connected to a compressed air pipeline, and the vacuum suction port of the vacuum generator is fixedly connected to the upper outlet of the vacuum buffer tank via a vacuum pumping pipeline.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] The aforementioned circulating water buffer tank is equipped with a level detector, and an electrically controlled valve is installed on the vacuum pipeline. The level detector and the electrically controlled valve are interlocked. The vacuum buffer tank is equipped with a pressure detector, and an electrically controlled valve is installed on the second exhaust pipeline. The pressure detector and the electrically controlled valve are interlocked.

[0009] The first processing pipeline is equipped with a first circulation pump. A second processing pipeline is fixedly connected to the first processing pipeline on both sides of the first circulation pump. A second processing pipeline is equipped with a second circulation pump. A third processing pipeline is fixedly connected to the second processing pipeline on both sides of the second circulation pump. A third processing pipeline is equipped with a third circulation pump.

[0010] The above-mentioned cooling tower spray inlet is fixedly connected to a cooling water spray pipeline.

[0011] A safety pipeline is fixedly connected between the first treatment pipeline and the softened water outlet pipeline between the second treatment pipeline and the cooling tower. Drainage pipelines are fixedly connected to the lower outlet of the circulating water buffer tank and the lower outlet of the cooling tower. A drainage pipeline is fixedly connected to the first treatment pipeline between the safety pipeline and the first circulating pump.

[0012] The softened water circulation pipeline is equipped with a flow meter, a temperature display, and a pressure display in sequence. The vacuum buffer tank is equipped with a pressure gauge. The first treatment pipeline between the first circulation pump and the second treatment pipeline is equipped with a pressure display. The second treatment pipeline between the second circulation pump and the third treatment pipeline is equipped with a pressure display. The third treatment pipeline between the third circulation pump and the second treatment pipeline is equipped with a pressure display. The first treatment pipeline between the second treatment pipeline and the safety pipeline is equipped with a temperature display. The softened water outlet pipeline corresponding to the right side of the safety pipeline is equipped with a temperature display.

[0013] This utility model has a reasonable and compact structure and is easy to use. By adding a vacuum buffer tank, a vacuum generator, and supporting pipelines, it can vent the circulating water buffer tank, effectively solving the problem that the existing closed-loop circulating water system requires reducing the load on the calcium carbide furnace and affecting the normal operation of the process due to the need for venting the buffer tank. It is safe and convenient. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0015] Appendix Figure 1The codes in the diagram are as follows: 1 for circulating water buffer tank, 2 for cooling tower, 3 for vacuum buffer tank, 4 for vacuum generator, 5 for softened water inlet pipeline, 6 for first treatment pipeline, 7 for softened water outlet pipeline, 8 for softened water circulation pipeline, 9 for first exhaust pipeline, 10 for second exhaust pipeline, 11 for compressed air pipeline, 12 for vacuuming pipeline, 13 for liquid level detector, 14 for pressure detector, 15 for electrically controlled valve one, 16 for electrically controlled valve two, 17 for first circulation pump, 18 for second treatment pipeline, 19 for second circulation pump, 20 for third treatment pipeline, 21 for third circulation pump, 22 for cooling water spray pipeline, 23 for safety pipeline, 24 for drainage pipeline, 25 for flow meter, 26 for temperature display, 27 for pressure display, and 28 for pressure gauge. Detailed Implementation

[0016] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0017] Unless otherwise specified, all equipment and devices used in this invention are existing and commonly known in the art. For example, the cooling tower 2, the liquid level detector 13, and the pressure detector 14 are all existing and commonly known equipment.

[0018] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0019] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0020] Example 1: As shown in the attached document Figure 1 As shown, the closed-loop circulating water system buffer tank exhaust device includes a circulating water buffer tank 1, a cooling tower 2, a vacuum buffer tank 3, and a vacuum generator 4. The upper inlet of the circulating water buffer tank 1 is fixedly connected to a softened water inlet pipeline 5. The lower outlet of the circulating water buffer tank 1 is fixedly connected to the upper inlet of the cooling tower 2 via a first treatment pipeline 6. The upper outlet of the cooling tower 2 is fixedly connected to a softened water outlet pipeline 7. The upper inlet of the circulating water buffer tank 1 is fixedly connected to a softened water circulation pipeline 8. The upper outlet of the circulating water buffer tank 1 is fixedly connected to a first exhaust pipeline 9. The first exhaust pipeline 9 is fixedly connected to the lower inlet of the vacuum buffer tank 3 via a second exhaust pipeline 10. The compressed air inlet of the vacuum generator 4 is fixedly connected to a compressed air pipeline 11. The vacuum suction port of the vacuum generator 4 is fixedly connected to the upper outlet of the vacuum buffer tank 3 via a vacuum pumping pipeline 12.

[0021] This utility model achieves venting of circulating water buffer tank 1 by adding a vacuum buffer tank 3, a vacuum generator 4, and supporting pipelines. Specifically, when the liquid level of circulating water buffer tank 1 drops to the lower limit, the vacuum generator 4 draws air from the vacuum buffer tank 3, thereby drawing air from the circulating water buffer tank 1. When the liquid level of circulating water buffer tank 1 rises to the upper limit, the vacuum generator 4 stops drawing air, and the venting ends. It effectively solves the problem that the venting of buffer tanks in existing closed-loop circulating water systems requires load reduction of the calcium carbide furnace, which affects the normal operation of processes. It is safe and simple.

[0022] The venting device of the buffer tank in the above-mentioned closed-loop circulating water system can be further optimized and / or improved according to actual needs:

[0023] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, the circulating water buffer tank 1 is equipped with a level detector 13, and the vacuum line 12 is equipped with an electrically controlled valve 15. The level detector 13 and the electrically controlled valve 15 are interlocked. The vacuum buffer tank 3 is equipped with a pressure detector 14, and the second exhaust line 10 is equipped with an electrically controlled valve 16. The pressure detector 14 and the electrically controlled valve 16 are interlocked. During use, when the level detector 13 on the circulating water buffer tank 1 detects that the liquid level has dropped to the lower limit, the interlocked control opens the electrically controlled valve 15, allowing the vacuum generator 4 to evacuate the gas inside the vacuum buffer tank 3. When the pressure detector 14 detects that the pressure inside the vacuum buffer tank 3 has reached approximately -30 kPa, the interlocked control opens the electrically controlled valve 16, allowing the gas inside the circulating water buffer tank 1 to be evacuated. When the level detector 13 on the circulating water buffer tank 1 detects that the liquid level has risen to the upper limit, the control closes the electrically controlled valve 15 and simultaneously closes the electrically controlled valve 16, ending the evacuation process.

[0024] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, a first processing pipeline 6 is equipped with a first circulation pump 17. A second processing pipeline 18 is fixedly connected to the first processing pipeline 6 on both sides of the first circulation pump 17. A second circulation pump 19 is installed on the second processing pipeline 18. A third processing pipeline 20 is fixedly connected to the second processing pipeline 18 on both sides of the second circulation pump 19. A third circulation pump 21 is installed on the third processing pipeline 20. During operation, if the first circulation pump 17 malfunctions or requires maintenance during overload operation, the standby second circulation pump 19 or third circulation pump 21 can be put into use to ensure the normal operation of the device.

[0025] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1As shown, the spray inlet of cooling tower 2 is fixedly connected to a cooling water spray pipeline 22. During operation, cooling water at approximately 25°C, delivered through the cooling water spray pipeline 22, cools the softened water at approximately 35°C delivered from the circulating water buffer tank 1. Cooling tower 2 is a commonly used piece of equipment.

[0026] Example 5: It differs from Examples 2 to 4 in that, as shown in the appendix... Figure 1 As shown, a safety pipeline 23 is fixedly connected between the first treatment pipeline 6 (between the second treatment pipeline 18 and the cooling tower 2) and the softened water outlet pipeline 7. Drainage pipelines 24 are fixedly connected to the lower outlet of the circulating water buffer tank 1 and the lower outlet of the cooling tower 2. A drainage pipeline 24 is also fixedly connected to the first treatment pipeline 6 (between the safety pipeline 23 and the first circulating pump 17). During operation and maintenance, the drainage pipeline 24 on the first treatment pipeline 6 is used to drain the circulating water from the pipeline.

[0027] Example 6: Its difference from Examples 2 to 4 is as follows: (See attached) Figure 1 As shown, as needed, a flow meter 25, a temperature display 26, and a pressure display 27 are sequentially installed on the softened water circulation pipeline 8; a pressure gauge 28 is installed on the vacuum buffer tank 3; a pressure display 27 is installed on the first treatment pipeline 6 between the first circulation pump 17 and the second treatment pipeline 18; a pressure display 27 is installed on the second treatment pipeline 18 between the second circulation pump 19 and the third treatment pipeline 20; a pressure display 27 is installed on the third treatment pipeline 20 between the third circulation pump 21 and the second treatment pipeline 18; a temperature display 26 is installed on the first treatment pipeline 6 between the second treatment pipeline 18 and the safety pipeline 23; and a temperature display 26 is installed on the softened water outlet pipeline 7 to the right of the safety pipeline 23. During use, the temperature display 26 and the pressure display 27 are used to monitor the temperature and pressure of the softened water on each pipeline in real time.

[0028] Depending on the needs, the pipelines and equipment of the buffer tank exhaust device of the closed-loop circulating water system may also be equipped with conventional valves known in the art, etc., according to production requirements.

[0029] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0030] The usage process of this utility model embodiment:

[0031] First, softened water at room temperature (temperature 25℃) is sent to the circulating water buffer tank 1 through the softened water inlet pipeline 5. The softened water in the circulating water buffer tank 1 is sent to the cooling tower 2 through the first treatment pipeline 6, and then sent to the downstream areas such as the calcium carbide furnace cover, furnace door, flue and transformer through the softened water outlet pipeline 7 for cooling.

[0032] Next, the valve of the softened water inlet pipeline 5 is closed. The softened water (temperature 35℃, i.e. the softened water after cooling in the downstream areas such as the calcium carbide furnace cover, furnace door, flue, and transformer) after heat exchange is sent to the circulating water buffer tank 1 through the softened water circulation pipeline 8. The softened water in the circulating water buffer tank 1 is sent to the cooling tower 2 through the first treatment pipeline 6 for cooling to about 25℃ to 30℃. Then, it is sent to the downstream areas such as the calcium carbide furnace cover, furnace door, flue, and transformer through the softened water outlet pipeline 7 for further cooling and use.

[0033] Finally, when the liquid level in the circulating water buffer tank 1 drops to the lower limit, the circulating water buffer tank 1 needs to be vented. The venting process is as follows: when the liquid level detector 13 on the circulating water buffer tank 1 detects that the liquid level has dropped to the lower limit, the interlock control opens the first solenoid valve 15, and the vacuum generator 4 draws the gas inside the vacuum buffer tank 3. When the pressure detector 14 detects that the pressure inside the vacuum buffer tank 3 reaches about -30KPa, the interlock control opens the second solenoid valve 16 to draw the gas inside the circulating water buffer tank 1. When the liquid level detector 13 on the circulating water buffer tank 1 detects that the liquid level has risen to the upper limit, the first solenoid valve 15 is closed, and at the same time, the second solenoid valve 16 is closed, and the venting ends.

Claims

1. A venting device for a buffer tank in a closed-loop circulating water system, characterized in that... The system includes a circulating water buffer tank, a cooling tower, a vacuum buffer tank, and a vacuum generator. The upper inlet of the circulating water buffer tank is fixedly connected to a softened water inlet pipeline. The lower outlet of the circulating water buffer tank is fixedly connected to the upper inlet of the cooling tower via a first treatment pipeline. The upper outlet of the cooling tower is fixedly connected to a softened water outlet pipeline. The upper inlet of the circulating water buffer tank is fixedly connected to a softened water circulation pipeline. The upper outlet of the circulating water buffer tank is fixedly connected to a first exhaust pipeline. The first exhaust pipeline is fixedly connected to the lower inlet of the vacuum buffer tank via a second exhaust pipeline. The compressed air inlet of the vacuum generator is fixedly connected to a compressed air pipeline. The vacuum suction inlet of the vacuum generator is fixedly connected to the upper outlet of the vacuum buffer tank via a vacuum pumping pipeline.

2. The venting device for the buffer tank of the closed-loop circulating water system according to claim 1, characterized in that... The circulating water buffer tank is equipped with a level detector, and the vacuum pipeline is equipped with an electrically controlled valve one. The level detector and the electrically controlled valve one are interlocked. The vacuum buffer tank is equipped with a pressure detector, and the second exhaust pipeline is equipped with an electrically controlled valve two. The pressure detector and the electrically controlled valve two are interlocked.

3. The venting device for the buffer tank of the closed-loop circulating water system according to claim 1 or 2, characterized in that... A first processing pipeline is equipped with a first circulation pump. A second processing pipeline is fixedly connected to the first processing pipeline on the left and right sides of the first circulation pump. A second processing pipeline is equipped with a second circulation pump. A third processing pipeline is fixedly connected to the second processing pipeline on the left and right sides of the second circulation pump. A third processing pipeline is equipped with a third circulation pump.

4. The venting device for the buffer tank of the closed-loop circulating water system according to claim 1 or 2, characterized in that... The cooling tower spray inlet is fixedly connected to a cooling water spray pipeline.

5. The venting device for the buffer tank of the closed-loop circulating water system according to claim 3, characterized in that... The cooling tower spray inlet is fixedly connected to a cooling water spray pipeline.

6. The venting device for the buffer tank of the closed-loop circulating water system according to claim 5, characterized in that... A safety pipeline is fixedly connected between the first treatment pipeline and the softened water outlet pipeline between the second treatment pipeline and the cooling tower. Drainage pipelines are fixedly connected to the lower outlet of the circulating water buffer tank and the lower outlet of the cooling tower. A drainage pipeline is fixedly connected to the first treatment pipeline between the safety pipeline and the first circulating pump.

7. The venting device for the buffer tank of the closed-loop circulating water system according to claim 3, characterized in that... A safety pipeline is fixedly connected between the first treatment pipeline and the softened water outlet pipeline between the second treatment pipeline and the cooling tower. Drainage pipelines are fixedly connected to the lower outlet of the circulating water buffer tank and the lower outlet of the cooling tower. A drainage pipeline is fixedly connected to the first treatment pipeline between the safety pipeline and the first circulating pump.

8. The venting device for the buffer tank of the closed-loop circulating water system according to claim 4, characterized in that... A safety pipeline is fixedly connected between the first treatment pipeline and the softened water outlet pipeline between the second treatment pipeline and the cooling tower. Drainage pipelines are fixedly connected to the lower outlet of the circulating water buffer tank and the lower outlet of the cooling tower. A drainage pipeline is fixedly connected to the first treatment pipeline between the safety pipeline and the first circulating pump.

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