Circulating water safe operation energy-saving device of high-position heat exchanger

Abstract

The utility model discloses a high-position heat exchanger circulating water safe operation energy-saving device which is used for a high-position heat exchanger circulating water system, and the high-position heat exchanger circulating water system comprises a heat exchanger arranged at a high position, a cooling tower arranged at a low position and a circulating pipeline connecting the heat exchanger with the cooling tower. The hydraulic turbine generator set is mounted at the position where the circulating pipeline enters the cooling tower; the exhaust and suction valve assembly is installed at the position, led out of the heat exchanger, of the circulation pipeline. According to the circulating water safe operation energy-saving device of the high-position heat exchanger, the hydraulic turbine generator set is arranged at the position where the circulating pipeline enters the cooling tower, and therefore potential energy can be recycled; the air exhaust and suction valve assembly is arranged at the position, led out of the heat exchanger, of the circulation pipeline, so that air left at the high position can be exhausted from the air exhaust and suction valve assembly, and meanwhile the air exhaust and suction valve assembly can achieve the air suction effect.

Description

Technical Field

[0001] This utility model relates to the field of high-level heat exchanger circulating water system devices, and in particular to an energy-saving device for safe operation of high-level heat exchanger circulating water. Background Technology

[0002] In existing technologies, heat exchange is a common process requirement in industrial production. In a heat exchanger, low-temperature water absorbs heat from the working fluid, thereby cooling the working fluid. Conversely, the low-temperature water absorbs heat and heats up, then cools down in a cooling tower, thus completing the entire heat exchange process. However, in some production processes, the heat exchanger needs to be placed at a higher position. The cooling water is pumped through a circulating water pump, undergoes process heat exchange, enters an open cooling tower for heat dissipation, falls into a collection tank, and is then drawn back into the circulating water pump and pumped back into the heat exchanger, in a continuous cycle.

[0003] When the circulating water pump starts up, air accumulates at the highest point of the pipeline and must be vented for stable operation. Currently, this is generally achieved using a vent pipe with an automatic air vent valve. The vent pipe is positioned high up, spraying water mist or foam, which can impact equipment and the surrounding environment. Besides the need to quickly vent air from higher positions during system startup, small amounts of air are also continuously generated during heat exchange system operation, and these small amounts also need to be vented. Furthermore, when the system stops or the pump stops due to a sudden power outage, the return water pipe creates negative pressure, affecting the safe operation of the system. Therefore, there is a need to draw in air when the system stops. Utility Model Content

[0004] The main purpose of this utility model is to provide an energy-saving device for safe operation of circulating water in high-level heat exchangers, aiming to solve the problems of energy waste and negative impacts of stagnant gas in high-level heat exchanger circulating water systems.

[0005] To achieve the above objectives, this utility model provides an energy-saving device for safe operation of circulating water in a high-level heat exchanger, used in a high-level heat exchanger circulating water system. The high-level heat exchanger circulating water system includes a heat exchanger installed at a high level, a cooling tower installed at a low level, and a circulation pipeline connecting the heat exchanger and the cooling tower. The energy-saving device for safe operation includes:

[0006] A hydraulic turbine generator set, wherein the hydraulic turbine generator set is installed at the location where the circulation pipeline enters the cooling tower;

[0007] The intake and exhaust valve assembly is installed at the point where the circulation pipeline exits from the heat exchanger.

[0008] Furthermore, the hydraulic turbine generator set includes a generator inlet and a generator outlet both connected to the circulation pipeline, and a second valve is provided between the generator inlet and the generator outlet in the circulation pipeline.

[0009] Furthermore, the intake and exhaust valve assembly includes a valve seat, a float, a fixed rod, and a valve cover. The valve seat is connected to the circulation pipeline. A working chamber is provided in the middle of the valve seat. An upwardly opening flow-blocking bowl is fixed in the working chamber. The float is fixed on the fixed rod. The fixed rod moves vertically and cooperates with the flow-blocking bowl. The valve cover is annular in shape and is installed on the valve seat to enclose the float in the working chamber. A first sealing ring corresponding to the float is provided circumferentially on the lower surface of the valve cover. An automatic exhaust valve connected to the working chamber is provided on the outer wall of the valve seat. The position of the automatic exhaust valve is higher than the working chamber.

[0010] Furthermore, the automatic exhaust valve is of the buoyancy type.

[0011] Furthermore, a second sealing ring is provided on the float at the position corresponding to the first sealing ring.

[0012] Furthermore, an exhaust cover is provided above the valve cover.

[0013] Furthermore, a drain port is provided at the bottom of the valve seat.

[0014] Furthermore, a third valve is provided between the exhaust / intake valve assembly and the circulation pipeline.

[0015] Furthermore, the connection between the valve seat and the valve cover is a flange connection.

[0016] Furthermore, the first sealing ring is mounted on the valve cover by a plurality of screws.

[0017] The energy-saving device for safe operation of circulating water in a high-level heat exchanger provided by this utility model uses a hydraulic turbine generator set installed at the point where the circulating pipeline enters the cooling tower, thereby recovering potential energy; the exhaust and suction valve assembly is installed at the point where the circulating pipeline exits from the heat exchanger, so that air trapped at a higher position can be discharged from the exhaust and suction valve assembly, while the exhaust and suction valve assembly can also perform the function of suction. Attached Figure Description

[0018] Figure 1 This is an installation diagram of the energy-saving device for safe operation of circulating water in a high-level heat exchanger, according to the first embodiment of this utility model.

[0019] Figure 2This is a schematic diagram (sealed state) of the exhaust and suction valve assembly in the energy-saving device for safe operation of circulating water in a high-level heat exchanger, according to the first embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram (air exchange state) of the exhaust and suction valve assembly in the energy-saving device for safe operation of circulating water in a high-level heat exchanger, according to the first embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the hydraulic turbine generator set in the energy-saving device for safe operation of circulating water in a high-level heat exchanger, as described in the first embodiment of this utility model.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0024] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0025] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0026] Reference Figures 1 to 4In one embodiment of this utility model, a safe operation and energy-saving device for high-level heat exchanger circulating water is provided for a high-level heat exchanger circulating water system. The high-level heat exchanger circulating water system includes a heat exchanger 010 installed at a high level, a cooling tower 020 installed at a low level, and a circulation pipeline 030 connecting the heat exchanger 010 and the cooling tower 020. The safe operation and energy-saving device includes:

[0027] A hydraulic turbine generator set 200 is installed at the location where the circulation pipeline 030 enters the cooling tower 020;

[0028] The intake and exhaust valve assembly 100 is installed at the point where the circulation pipeline 030 exits from the heat exchanger 010.

[0029] In this invention, a safe operation and energy-saving device is used in a high-level heat exchanger circulating water system. The high-level heat exchanger circulating water system includes a heat exchanger 010, a cooling tower 020, and a circulation pipe 030 connecting the heat exchanger 010 and the cooling tower 020. Heat exchange water circulates between the heat exchanger 010 and the cooling tower 020 through the circulation pipe 030. The safe operation and energy-saving device includes a suction / exhaust valve assembly 100 installed at the outlet position of the circulation pipe 030 from the heat exchanger 010. Considering that the heat exchange water entering the cooling tower 020 from the heat exchanger 010 through the circulation pipe 030 has a large elevation difference, the excess pressure head directly acts on both the cooling tower 020 and the circulation pipe 030, potentially causing damage and affecting the normal operation of the system. Generally, excess pressure head is reduced and throttled using valves, resulting in unnecessary energy waste. By installing a hydraulic turbine generator set 200 at the point where the circulation pipe 030 enters the cooling tower 020, potential energy can be recovered. The hydraulic turbine generator set 200 can be configured in various ways. For example, the power generation unit of the hydraulic turbine generator set 200 can be directly installed in the circulation pipeline 030, or the power generation unit of the hydraulic turbine generator set 200 can be installed in the circulation pipeline 030 via a bypass. The exhaust and intake valve assembly 100 is located at the outlet of the circulation pipeline 030 from the heat exchanger 010, so that air trapped at a higher position can be discharged from the exhaust and intake valve assembly 100, while the exhaust and intake valve assembly 100 can also perform the function of intake. The structure of the exhaust and intake valve assembly 100 can refer to existing conventional designs, but further limitations are imposed in subsequent embodiments.

[0030] In summary, by setting the hydraulic turbine generator set 200 at the position where the circulation pipeline 030 enters the cooling tower 020, potential energy can be recovered; the exhaust and suction valve assembly 100 is set at the position where the circulation pipeline 030 exits from the heat exchanger 010, so that the air stagnating at a higher position can be discharged from the exhaust and suction valve assembly 100, and at the same time, the exhaust and suction valve assembly 100 can also achieve the function of suction.

[0031] In one embodiment, the hydraulic turbine generator set 200 includes a hydraulic turbine inlet and a hydraulic turbine outlet both connected to the circulation pipeline 030, and the circulation pipeline 030 is provided with a bypass valve 300 between the hydraulic turbine inlet and the hydraulic turbine outlet.

[0032] Reference Figure 1 In one embodiment, the hydraulic turbine generator set 200 includes a generator inlet and a generator outlet both connected to the circulation pipeline 030, and a second valve 300 is provided in the circulation pipeline 030 between the generator inlet and the generator outlet.

[0033] In this embodiment, the hydraulic turbine generator set 200 is installed in a bypass configuration. Heat exchange water enters from the generator inlet, then acts on the power generation unit of the hydraulic turbine generator set 200, and finally returns to the circulation pipeline 030 from the generator outlet. A second valve 300 is installed in the circulation pipeline 030 between the generator inlet and outlet. When the hydraulic turbine generator set 200 is to be started, the second valve 300 is closed; when the hydraulic turbine generator set 200 is to be stopped, the second valve 300 is opened.

[0034] Reference Figures 1 to 3 In one embodiment, the intake / exhaust valve assembly 100 includes a valve seat 110, a float 120, a fixing rod 130, and a valve cover 140. The valve seat 110 is connected to the circulation pipeline 030. A working chamber 111 is provided in the middle of the valve seat 110. An upwardly opening flow-blocking bowl 150 is fixed in the working chamber 111. The float 120 is fixed on the fixing rod 130. The fixing rod 130 moves vertically and cooperates with the flow-blocking bowl 150. The valve cover 140 is generally annular and is installed on the valve seat 110 to enclose the float 120 in the working chamber 111. A first sealing ring 160 corresponding to the float 120 is provided circumferentially on the lower surface of the valve cover 140. An automatic exhaust valve 170 is provided on the outer wall of the valve seat 110, which is connected to the working chamber 111. The position of the automatic exhaust valve 170 is higher than the working chamber 111.

[0035] In this embodiment, the intake / exhaust valve assembly 100 includes a valve seat 110, a float 120, a fixing rod 130, and a valve cover 140. The valve seat 110 is connected to the circulation pipeline 030. A working chamber 111 is provided in the middle of the valve seat 110, through which fluid in the circulation pipeline 030 can enter the working chamber 111. An upwardly opening baffle bowl 150 is fixed inside the working chamber 111. The float 120 is fixed to the fixing rod 130, and the fixing rod 130 moves vertically to cooperate with the baffle bowl 150. The baffle bowl 150 prevents the fluid from impacting the float 120, improving the working stability of the float 120 and reducing the probability of accidental structural damage. The valve cover 140 is annular in shape and is installed on the valve seat 110, enclosing the float 120 within the working chamber 111. The valve cover 140 is annular with a vent in the center, allowing for rapid air exhaust and intake. A first sealing ring 160 corresponding to the float 120 is circumferentially arranged on the lower surface of the valve cover 140. An automatic exhaust valve 170, leading to the working chamber 111, is located on the outer wall of the valve seat 110. The automatic exhaust valve 170 is positioned higher than the working chamber 111, enabling slow air exhaust.

[0036] During operation, because the safety and energy-saving device is located at a high position, when air is present in the circulation pipe 030, the float 120 is in the lower position, allowing the air to be discharged from the safety and energy-saving device through the valve cover 140. After the air is discharged, the working chamber 111 contains heat exchange water, at which point the float 120 rises and forms a seal with the first sealing ring 160 on the valve cover 140, allowing the entire high-level heat exchanger circulating water system to operate normally. When the high-level heat exchanger circulating water system stops or the pump stops due to a sudden power outage, a negative pressure is generated in the circulation pipe 030, drawing in air through the valve cover 140. During normal operation of the high-level heat exchanger circulating water system, trace amounts of gas escape from the circulating water and can enter the automatic air vent 170 from the working chamber 111, thus removing the trace amounts of air.

[0037] The float 120 can automatically seal and release the valve cover 140 due to buoyancy, thereby achieving the effect of sealing and rapid airflow. Through structural design, it can achieve large and rapid venting when the high-level heat exchanger circulating water system starts up and large and rapid intake when the high-level heat exchanger circulating water system stops. The automatic vent valve 170 is located higher than the working chamber 111, and can achieve continuous micro-venting during the operation of the high-level heat exchanger circulating water system.

[0038] In one embodiment, the automatic exhaust valve 170 is a buoyancy type.

[0039] In this embodiment, the automatic exhaust valve 170 is buoyancy-type, which can stably expel gas while ensuring that heat exchange water will not be discharged from the location of the automatic exhaust valve 170.

[0040] Reference Figures 1 to 3 In one embodiment, a second sealing ring is provided on the float 120 at a position corresponding to the first sealing ring 160.

[0041] In this embodiment, the introduction of the second sealing ring improves the sealing effect between the float 120 and the first sealing ring 160 when they work together, and also provides a buffering effect.

[0042] Reference Figures 1 to 3 In one embodiment, an exhaust cover 180 is provided above the valve cover 140.

[0043] In this embodiment, the exhaust cover 180 prevents liquid or solid impurities from entering through the valve cover 140, while not obstructing the entry and exit of gas from the valve cover 140. The exhaust cover 180 can be fixed to the valve cover 140 in various ways, with the aim of shielding, and the specific structure is not limited.

[0044] Reference Figures 1 to 3 In one embodiment, a drain port 112 is provided at the bottom of the valve seat 110.

[0045] In this embodiment, the drain port 112 allows for internal observation, maintenance, and cleaning of the intake and exhaust valve assembly 100 without disassembling it. The drain port 112 can be sealed using bolts or flanges.

[0046] In one embodiment, a third valve is provided between the exhaust / intake valve assembly 100 and the circulation pipeline 030.

[0047] In this embodiment, considering that the exhaust / intake valve assembly 100 is open when there is no heat exchange water, this allows for exchange between the external environment and the high-level heat exchanger circulating water system. Therefore, a third valve is introduced. By opening and closing the third valve, the operation of the safe operation energy-saving device is controlled to be introduced into the high-level heat exchanger circulating water system. The third valve can operate manually or electrically, depending on the specific application requirements.

[0048] In one embodiment, the connection between the valve seat 110 and the valve cover 140 is a flange connection.

[0049] In this embodiment, the connection method between the valve seat 110 and the valve cover 140 is limited, thereby ensuring the positional accuracy of the first sealing ring 160 and guaranteeing the sealing effect it provides.

[0050] In one embodiment, the first sealing ring 160 is mounted on the valve cover 140 by a plurality of screws.

[0051] In this embodiment, the fixing method of the first sealing ring 160 is defined, so that the installation of the first sealing ring 160 is stable and the possibility of failure is reduced.

[0052] In summary, the energy-saving device for safe operation of circulating water in a high-level heat exchanger provided by this utility model allows the float 120 to automatically seal and release the valve cover 140 due to buoyancy, thereby achieving the effects of sealing and rapid airflow. Through structural design, it enables large-volume and rapid venting during the start-up of the high-level heat exchanger circulating water system and large-volume and rapid intake during the shutdown of the high-level heat exchanger circulating water system. The automatic vent valve 170 is positioned higher than the working chamber 111, and continuous micro-venting is achieved through the automatic vent valve 170 during the operation of the high-level heat exchanger circulating water system.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A high-level heat exchanger circulating water safe operation energy-saving device for a high-level heat exchanger circulating water system, the high-level heat exchanger circulating water system comprising a heat exchanger (010) arranged at a high level, a cooling tower (020) arranged at a low level, and a circulating pipeline (030) connecting the heat exchanger (010) and the cooling tower (020), characterized in that, The safe operation energy-saving device comprises: a hydraulic turbine generator set (200) installed at a position where the circulating pipeline (030) enters the cooling tower (020); an exhaust valve assembly (100) installed at a position where the circulating pipeline (030) is led out from the heat exchanger (010).

2. The high-level heat exchanger circulating water safe operation energy-saving device according to claim 1, characterized in that, The hydraulic turbine generator set (200) comprises a hydraulic turbine water inlet end and a hydraulic turbine water outlet end both connected to the circulating pipeline (030), and a bypass valve (300) is arranged between the hydraulic turbine water inlet end and the hydraulic turbine water outlet end.

3. The high-level heat exchanger circulating water safe operation energy-saving device according to claim 1, characterized in that, The exhaust valve assembly (100) comprises a valve seat (110), a float (120), a fixed rod (130) and a valve cover (140), the valve seat (110) is connected to the circulating pipeline (030), a middle part of the valve seat (110) is provided with a working cavity (111), an upwardly open flow bowl (150) is fixed in the working cavity (111), the float (120) is fixed on the fixed rod (130), the fixed rod (130) is movably arranged in a vertical direction and cooperates with the flow bowl (150), the valve cover (140) is annular in shape and is installed on the valve seat (110) to enclose the float (120) in the working cavity (111), a first sealing ring (160) corresponding to the float (120) is arranged on a lower surface of the valve cover (140) in a circumferential direction, an automatic exhaust valve (170) connected to the working cavity (111) is arranged on an outer wall of the valve seat (110), and the automatic exhaust valve (170) is arranged at a position higher than the working cavity (111).

4. The high-level heat exchanger circulating water safe operation energy-saving device according to claim 3, characterized in that, The automatic exhaust valve (170) is of a buoyancy type.

5. The high-level heat exchanger circulating water safe operation energy-saving device according to claim 3, characterized in that, A second sealing ring is arranged on the float (120) at a position corresponding to the first sealing ring (160).

6. The high-level heat exchanger circulating water safe operation energy-saving device according to claim 3, characterized in that, An exhaust cover (180) is arranged above the valve cover (140).

7. The high-level heat exchanger circulating water safe operation energy-saving device according to any one of claims 3-6, characterized in that, A blowdown opening (112) is arranged at a bottom of the valve seat (110).

8. The high-level heat exchanger circulating water safe operation energy-saving device according to any one of claims 3-6, characterized in that, A valve is arranged between the exhaust valve assembly (100) and the circulating pipeline (030).

9. The high-level heat exchanger circulating water safe operation energy-saving device according to any one of claims 3-6, characterized in that, The valve seat (110) and the valve cover (140) are connected by flange connection.

10. The high-level heat exchanger circulating water safe operation energy-saving device according to any one of claims 3-6, characterized in that, The first sealing ring (160) is installed on the valve cover (140) by a plurality of screws.

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