Device for preventing water hammer of cooling heat exchanger

Abstract

The utility model discloses a device for preventing a water hammer of a cooling heat exchanger, which structurally comprises a circulating water return pipeline and a circulating water inlet pipeline which are connected with the cooling heat exchanger, the circulating water return pipeline is connected with a nitrogen purging pipeline, and a first pneumatic valve and a first check valve are assembled on the nitrogen purging pipeline. After the technical scheme is adopted, according to the device for preventing the water hammer of the cooling heat exchanger, the nitrogen purging pipeline is additionally arranged on the circulating water return pipeline of the cooling heat exchanger, after cooling is finished, cooling water in the pipeline of the cooling heat exchanger can be purged to be clean, the water hammer phenomenon is prevented, and the running stability of equipment is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a device for preventing water hammer of a cooling heat exchanger. Background Art

[0002] After the traditional cooling heat exchanger is cooled, there is cooling water in the cooling heat exchanger pipe. When the next process needs to increase the temperature (>100℃), the cooling water in the cooling heat exchanger pipe is partially vaporized, causing a significant increase in pressure and water hammer phenomenon, which can seriously cause the pipe to rupture, deform or be damaged. Utility Model Content

[0003] In view of the above problems, the utility model provides a device for preventing water hammer in a cooling heat exchanger.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for preventing water hammer of a cooling heat exchanger, whose structure includes a circulating water return pipeline and a circulating water inlet pipeline connected to the cooling heat exchanger, a nitrogen purge pipeline is connected to the circulating water return pipeline, and a first pneumatic valve and a first check valve are installed on the nitrogen purge pipeline.

[0005] Preferably, the circulating water return pipeline and the circulating water inlet pipeline are connected via a connecting pipe.

[0006] Preferably, the connecting pipeline is equipped with a second pneumatic valve and a second check valve.

[0007] Preferably, the nitrogen purge pipeline and the connecting pipeline are both DN25 stainless steel pipelines.

[0008] Preferably, a circulating water return valve is provided on the circulating water return pipeline.

[0009] Preferably, the connection point between the nitrogen purge pipeline and the circulating water return pipeline is located on the right side of the circulating water return valve.

[0010] Preferably, a regulating valve is provided on the circulating water inlet pipeline.

[0011] Preferably, one end of the connecting pipe is connected to the left side of the circulating water return valve, and the other end of the connecting pipe is connected to the right side of the regulating valve.

[0012] Preferably, the first pneumatic valve and the second pneumatic valve are both DN25 pneumatic valves.

[0013] Preferably, the circulating water return pipeline is connected to the upper part of the cooling heat exchanger, and the circulating water inlet pipeline is connected to the lower part of the cooling heat exchanger.

[0014] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:

[0015] The utility model provides a device for preventing water hammer of a cooling heat exchanger. By adding a nitrogen purge pipeline on the circulating water return pipeline of the cooling heat exchanger, the cooling water in the cooling heat exchanger pipeline can be purged clean after cooling is completed to prevent water hammer phenomenon and further ensure the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The utility model is a schematic diagram of a device for preventing water hammer in a cooling heat exchanger. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] Example

[0023] refer to Figure 1 A device for preventing water hammer in a cooling heat exchanger, the structure of which includes a circulating water return pipeline 1 and a circulating water inlet pipeline 2 connected to a cooling heat exchanger 5, the circulating water return pipeline 1 is connected to a nitrogen purge pipeline 3, and the nitrogen purge pipeline 3 is equipped with a first pneumatic valve 31 and a first check valve 32; the circulating water return pipeline 1 is connected to the circulating water inlet pipeline 2 through a connecting pipeline 4; the connecting pipeline 4 is equipped with a second pneumatic valve 41 and a second check valve 42; the nitrogen purge pipeline 3 and the connecting pipeline 4 are both DN25 stainless steel pipelines; the circulating water return pipeline 1 is provided with a circulating water return valve 11; the connection between the nitrogen purge pipeline 3 and the circulating water return pipeline 1 is located on the right side of the circulating water return valve 11; the circulating water inlet pipeline 2 is provided with a regulating valve 21; one end of the connecting pipeline 4 is connected to the left side of the circulating water return valve 11, and the other end of the connecting pipeline 4 is connected to the right side of the regulating valve 21; the first pneumatic valve 31 and the second pneumatic valve 41 are both DN25 pneumatic valves; the circulating water return pipeline 1 is connected to the upper part of the cooling heat exchanger 5, and the circulating water inlet pipeline 2 is connected to the lower part of the cooling heat exchanger 5. By adopting this structure, a nitrogen purge pipeline 3 is added to the circulating water return pipeline 1 of the cooling heat exchanger 5. After cooling, the cooling water in the pipeline of the cooling heat exchanger 5 can be purged clean to prevent water hammer and further ensure the stability of equipment operation; wherein, the first check valve 32 and the second check valve 42 can prevent nitrogen from mixing with the circulating water, and the circulating inlet water and the circulating return water; the first pneumatic valve 31 and the second pneumatic valve 41 can realize automatic purge of the circulating water inside the cooling heat exchanger 5, and the purged circulating water can be returned to the circulating water pool to avoid the external discharge of the circulating water and reduce the amount of sewage treatment.

[0024] When used specifically: first confirm that the circulating water return valve 11 of the cooling heat exchanger 5 is in the closed state, open the first pneumatic valve 31 on the nitrogen purge pipeline 3 and the second pneumatic valve 41 on the connecting pipeline 4 in turn, and the nitrogen provided by the nitrogen purge pipeline 3 is purged from top to bottom for 2 minutes (the purging time needs to be determined by the actual volume of the cooling heat exchanger 5), and then close the first pneumatic valve 31 on the nitrogen purge pipeline 3 and the second pneumatic valve 41 on the connecting pipeline 4 in turn, so as to be able to purge the cooling water in the cooling heat exchanger 5 pipeline clean, prevent water hammer phenomenon, and further ensure the stability of equipment operation.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preventing water hammer in a cooling heat exchanger, characterized in that: Its structure includes a circulating water return pipeline and a circulating water inlet pipeline connected to the cooling heat exchanger. The circulating water return pipeline is connected to a nitrogen purge pipeline, and the nitrogen purge pipeline is equipped with a first pneumatic valve and a first check valve.

2. A device for preventing water hammer in a cooling heat exchanger according to claim 1, characterized in that: The circulating water return pipeline and the circulating water inlet pipeline are connected via a connecting pipeline.

3. A device for preventing water hammer in a cooling heat exchanger according to claim 2, characterized in that: The connecting pipeline is equipped with a second pneumatic valve and a second check valve.

4. The device for preventing water hammer in a cooling heat exchanger according to claim 1, characterized in that: The nitrogen purge pipeline and connecting pipeline are both DN25 stainless steel pipelines.

5. The device for preventing water hammer in a cooling heat exchanger according to claim 2, characterized in that: A circulating water return valve is arranged on the circulating water return pipeline.

6. The device for preventing water hammer in a cooling heat exchanger according to claim 5, characterized in that: The connection point between the nitrogen purge pipeline and the circulating water return pipeline is located on the right side of the circulating water return valve.

7. The device for preventing water hammer in a cooling heat exchanger according to claim 6, characterized in that: A regulating valve is arranged on the circulating water inlet pipeline.

8. The device for preventing water hammer in a cooling heat exchanger according to claim 7, characterized in that: One end of the connecting pipe is connected to the left side of the circulating water return valve, and the other end of the connecting pipe is connected to the right side of the regulating valve.

9. The device for preventing water hammer in a cooling heat exchanger according to claim 3, characterized in that: The first pneumatic valve and the second pneumatic valve are both DN25 pneumatic valves.

10. The device for preventing water hammer in a cooling heat exchanger according to claim 1, characterized in that: The circulating water return pipeline is connected to the upper part of the cooling heat exchanger, and the circulating water inlet pipeline is connected to the lower part of the cooling heat exchanger.

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