Efficient circulating water conveying system

Abstract

The utility model provides an efficient circulating water conveying system which comprises a cooling water tower, a water collecting tank located below the cooling water tower, a circulating water pump connected with the water collecting tank through a first pipeline and a heat exchanger connected with the circulating water pump through a second pipeline, and the heat exchanger is further connected with the cooling water tower through a third pipeline. A water return valve, a flow sensor I and a hydraulic sensor are arranged on the pipeline III; a water inlet valve is arranged on the pipeline I; a liquid level sensor is arranged on the inner side of the water collecting tank; a water outlet valve, a water feeding valve and a flow sensor II are arranged on the pipeline II; a temperature sensor is mounted on the heat exchanger; the first flow sensor, the hydraulic sensor, the liquid level sensor and the second flow sensor are all connected with the PLC. The PLC is used for accurately adjusting the opening degree of each valve so as to control the flow of cooling water, so that the pipe network resistance in the circulating water conveying system is reduced, the conveying efficiency of the circulating water conveying system is improved, and the energy consumption in the circulating water conveying process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field, concretely relates to a kind of efficient circulating water delivery system. BACKGROUND

[0002] In industrial production, heat exchanger as the key equipment of energy conversion, its operating efficiency directly affects the energy utilization and cost control of entire production process, however, heat exchanger will produce a large amount of heat in working process, if not handled in time, not only can affect the normal operation of equipment, also possibly to production environment and personnel safety constitute threat. Therefore, using cooling water to cool high-temperature water after heat exchange, forms circulating reuse water delivery system, is important measure of saving water resources, improving energy utilization efficiency in industrial production.

[0003] The existing circulating cooling water delivery system in the use of industrial production, because need manual adjustment valve opening, can lead to valve opening shortage or too large, when valve opening is insufficient, can reduce the flow area of cooling water, make water flow speed accelerate, and then lead to local resistance increase, cause pipe network resistance to increase, circulating water pump needs more energy to overcome pipe network resistance, lead to energy consumption increase, reduce the efficiency of circulating water delivery, when valve opening is too large, can lead to cooling water flow too large, exceed system demand, cause energy waste, reduce the efficiency of circulating water delivery.

[0004] Therefore, the present scheme proposes a kind of efficient circulating water delivery system to solve the above technical problems. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a kind of efficient circulating water delivery system, the flow of cooling water is accurately adjusted by using PLC controller to control the opening of each valve, reduce the pipe network resistance in circulating water delivery system, improve the delivery efficiency of circulating water delivery system, reduce the energy consumption in circulating water delivery process.

[0006] To achieve the above object, the utility model provides a kind of efficient circulating water delivery system, including cooling water tower, the water collecting pool below the cooling water tower, the circulating water pump being connected with the water collecting pool by pipeline one, the heat exchanger being connected with the circulating water pump by pipeline two, the heat exchanger is also connected with the cooling water tower by pipeline three;

[0007] The backwater valve, flow sensor one and hydraulic sensor are arranged on the pipeline three.

[0008] The water inlet valve is arranged on the pipeline one, and the liquid level sensor is arranged on the inner side of the water collecting pool.

[0009] The water outlet valve, water inlet valve and flow sensor two are arranged on the pipeline two.

[0010] The heat exchanger is provided with a temperature sensor;

[0011] The flow sensor one, the hydraulic sensor, the liquid level sensor and the flow sensor two are connected with the PLC controller.

[0012] Further, the bottom valve is arranged at the water outlet position where the bottom of the water collecting pool is connected with the pipeline one.

[0013] Further, the backwater valve, the water inlet valve, the water outlet valve, the water inlet valve, the bottom valve (21) are all electric micro-resistance valves, and the backwater valve, the water inlet valve, the water outlet valve, the water inlet valve and the bottom valve are connected with the PLC controller.

[0014] Further, the heat exchanger comprises a shell, a medium inlet end arranged on the shell, a medium outlet end arranged on the shell, a cooling water inlet end one arranged on the shell, and a cooling water outlet end arranged on the shell, and the temperature sensor is arranged at the cooling water inlet end one.

[0015] The medium inlet end and the medium outlet end are provided with a medium side heat exchange pipe;

[0016] The cooling water inlet end one and the cooling water outlet end are provided with a cooling water side heat exchange pipe;

[0017] The medium side heat exchange pipe and the cooling water side heat exchange pipe are arranged in a spiral manner inside the shell.

[0018] The cooling water outlet end is connected with the backwater valve through the pipeline three.

[0019] Further, the cooling water tower comprises a tower body, a cooling fan arranged above the tower body, a water spraying device arranged inside the tower body and below the cooling fan, and a cooling water inlet end two arranged on the tower body.

[0020] The cooling water inlet end two is connected with the backwater valve through the pipeline three.

[0021] Further, the water collecting pool is located below the water spraying device, and a distance is arranged between the water collecting pool and the water spraying device.

[0022] Further, the circulating water pump has a plurality of;

[0023] The water inlet valve has a plurality of;

[0024] The water outlet valve has a plurality of.

[0025] The beneficial effects of the utility model are as follows:

[0026] (1) The utility model discloses a bottom valve is set up at the bottom of the water collecting pool, and the bottom valve is one-way valve, only allows water body from the water collecting pool to pipeline one, when the circulating water pump appears short time pause, the bottom valve will be closed automatically, prevents the water body in pipeline one from flowing back to the water collecting pool, to keep pipeline one always full of water body, and then ensures the continuity of cooling water delivery, reduces the interruption of delivery caused by water body backflow or air entry, plays the role of improving delivery efficiency, saving energy.

[0027] (2) The utility model discloses setting water inlet valve, water outlet valve, water inlet valve, backwater valve, bottom valve in whole circulating cooling water delivery system, and all adopt electric micro-resistance valve, and set up flow sensor no. 1, hydraulic sensor, flow sensor no. 2, liquid level sensor, temperature sensor monitor the flow, pressure, temperature etc. of cooling water in circulating water delivery system, accurately adjust the opening of each valve to control the flow of cooling water through PLC controller, reduce the resistance when cooling water passes, to make the water flow more smooth, reduce pipe network resistance, improve water delivery efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the structural schematic diagram of the utility model.

[0029] Among them, the sign is: 1, cooling water tower, 11, tower body, 12, cooling fan, 13, water spraying device, 14, cooling water import end two, 2, water collecting pool, 21, bottom valve, 3, circulating water pump, 4, heat exchanger, 41, shell, 42, medium import end, 43, medium export end, 44, cooling water import end one, 45, cooling water export end, 46, medium side heat exchange pipe, 47, cooling water side heat exchange pipe, 5, backwater valve, 6, water inlet valve, 7, water outlet valve, 8, water inlet valve. DETAILED DESCRIPTION

[0030] In order to be more clear to the technical features of the scheme, the following through specific implementation, the scheme is described.

[0031] As Figure 1 Indicated, a kind of efficient circulating water delivery system, including cooling water tower 1, water collecting pool 2 located in the lower of cooling water tower 1, circulating water pump 3 with water collecting pool 2 are connected by pipeline one, and circulating water pump 3 is connected with heat exchanger 4 by pipeline two, and heat exchanger 4 is also connected with cooling water tower 1 by pipeline three;

[0032] Pipeline three is provided with backwater valve 5, flow sensor no. 1, hydraulic sensor;

[0033] Pipeline one is provided with water inlet valve 6, and the inside of water collecting pool 2 is provided with liquid level sensor;

[0034] Pipeline two is provided with water outlet valve 7, water inlet valve 8, flow sensor no. 2.

[0035] The heat exchanger 4 is provided with a temperature sensor;

[0036] The flow sensor one, the hydraulic sensor, the liquid level sensor, and the flow sensor two are connected with the PLC controller.

[0037] Further, the bottom valve 21 is arranged at the bottom of the water collecting pool 2 and connected with the pipeline one at the water outlet position.

[0038] Further, the backwater valve 5, the water inlet valve 6, the water outlet valve 7, the water inlet valve 8, and the bottom valve 21 are all electric micro-resistance valves, and are all connected with the PLC controller.

[0039] Preferably, the flow sensor one, the hydraulic sensor, the flow sensor two, the liquid level sensor, and the temperature sensor are all connected with the PLC controller, and the electric actuators of the backwater valve 5, the water inlet valve 6, the water outlet valve 7, the water inlet valve 8, and the bottom valve 21 are all connected with the PLC controller, and the PLC controller controls the opening degree of each valve by receiving the signals of each sensor and controlling the electric actuators of each valve, so as to improve the efficiency of the circulating water conveying system.

[0040] Preferably, the bottom valve 21 is arranged at the bottom of the water collecting pool 2 and connected with the pipeline one at the water outlet position, for controlling the water flow at the bottom of the water collecting pool 2, and the bottom valve 21 is a one-way valve, preventing the cooling water of the pipeline one from flowing back, and ensuring good suction conditions of the circulating water pump 3.

[0041] The PLC controller controls the opening and closing of the bottom valve 21 in real time according to the signal of the liquid level sensor. When the water level of the water collecting pool 2 is normal, the PLC controller keeps the bottom valve 21 open, ensuring smooth water flow. When the liquid level sensor detects that the water level of the water collecting pool 2 is too low, the PLC automatically closes the bottom valve 21, preventing the circulating water pump 3 from sucking in air, ensuring the continuity of the cooling water conveying, reducing the interruption of conveying caused by the backflow of cooling water or the entry of air, and improving the efficiency of the circulating water conveying and saving energy.

[0042] Preferably, the pipeline three is connected with the heat exchanger 4 and the cooling water tower 1, and the backwater valve 5, the flow sensor one, and the hydraulic sensor are all arranged on the pipeline three. The backwater valve 5 is a one-way valve, the flow sensor one is used for monitoring the cooling water flow of the pipeline three in real time, and the hydraulic sensor is used for monitoring the cooling water pressure of the pipeline three in real time.

[0043] The backwater valve 5 is used for controlling the flow of cooling water from the heat exchanger 4 back to the cooling water tower 1 according to the system demand, ensuring that the cooling water flows in one direction inside the pipeline three, preventing backflow, and maintaining the pressure balance of the system.

[0044] In normal operation, the PLC controller receives signals from the flow sensor one and the hydraulic sensor, calculates the flow and pressure of the cooling water in the pipeline three in real time, and controls the electric actuator of the return valve 5 according to the preset flow range of the cooling water in the pipeline three to adjust the opening of the return valve 5. If the flow of the cooling water in the pipeline three is lower than the preset value, the PLC controller increases the opening of the return valve 5. If the flow of the cooling water in the pipeline three is higher than the preset value, the PLC controller decreases the opening of the return valve 5. When the hydraulic sensor detects that the pressure of the cooling water in the pipeline three is abnormal (such as sudden drop in pressure), the PLC controller determines that there may be a risk of backflow, and then the PLC controller immediately closes the return valve 5 to prevent the cooling water from flowing back to the heat exchanger 4.

[0045] Preferably, the pipeline one connects the water collecting pool 2 and the circulating water pump 3, and the water inlet valve 6 is installed on the pipeline one to control the flow of the cooling water from the water collecting pool 2 into the circulating water pump 3, so as to ensure that the pipeline one is filled with water and reduce the risk of idling when the circulating water pump 3 starts.

[0046] The liquid level sensor is installed in the water collecting pool 2 to monitor the water level of the water collecting pool 2 in real time. If the water level of the water collecting pool is normal, the water inlet valve 6 is opened. If the liquid level sensor detects that the water level of the water collecting pool 2 is high, the PLC controller increases the opening of the water inlet valve 6 to increase the water inlet flow. If the liquid level sensor detects that the water level of the water collecting pool 2 is low, the PLC controller decreases the opening of the water inlet valve 6. If the liquid level sensor detects that the water level of the water collecting pool 2 is too low and lower than the preset value of the system, the PLC controller closes the water inlet valve 6 to prevent the circulating water pump 3 from sucking air.

[0047] Preferably, the pipeline two connects the circulating water pump 3 and the heat exchanger 4, and the water outlet valve 7 and the water inlet valve 8 are installed on the pipeline two to control the flow of the cooling water from the circulating water pump 3 to the heat exchanger 4, so as to ensure that the heat exchanger 4 obtains sufficient cooling water.

[0048] The PLC controller receives signals from the flow sensor two, calculates the flow of the cooling water in the pipeline two in real time, and dynamically adjusts the opening of the water outlet valve 7 according to the demand of the heat exchanger 4. If the flow of the cooling water in the pipeline two is lower than the preset value, the PLC controller increases the opening of the water outlet valve 7. If the flow of the cooling water in the pipeline two is higher than the preset value, the PLC controller decreases the opening of the water outlet valve 7 to ensure the stability of the flow of the cooling water in the pipeline two.

[0049] The temperature sensor is installed at the cooling water inlet end one of the heat exchanger 4, which monitors the temperature of the cooling water in real time. If the temperature of the cooling water is too high, the PLC increases the opening of the water valve 8 to increase the flow of cooling water. If the temperature of the cooling water is too low, the PLC controller reduces the opening of the water valve 8 to reduce the flow of cooling water, so as to ensure the stability of the temperature of the cooling water. If the temperature of the cooling water is abnormal, the PLC controller closes the water valve 8 to protect the system equipment.

[0050] Further, the heat exchanger 4 comprises a shell 41, a medium inlet end 42 arranged on the shell 41, a medium outlet end 43 arranged on the shell 41, a cooling water inlet end one 44 arranged on the shell 41, and a cooling water outlet end 45 arranged on the shell 41.

[0051] The medium side heat exchange pipe 46 is arranged between the medium inlet end 42 and the medium outlet end 43.

[0052] The cooling water side heat exchange pipe 47 is arranged between the cooling water inlet end one 44 and the cooling water outlet end 45.

[0053] The medium side heat exchange pipe 46 and the cooling water side heat exchange pipe 47 are arranged in a spiral manner inside the shell 41.

[0054] The cooling water outlet end 44 is connected to the water return valve 5 through the pipeline three.

[0055] Preferably, the heat exchanger 4 is responsible for realizing the heat transfer between the medium and the cooling water.

[0056] Preferably, the shell 41 is used to provide a closed environment for the heat exchange process inside the heat exchanger 4.

[0057] Preferably, the shell 41 is made of corrosion-resistant and high-strength materials to meet the use requirements under various working conditions.

[0058] Preferably, the medium inlet end 42 is used to introduce the medium to be heated or cooled.

[0059] Preferably, the medium outlet end 43 is used to discharge the medium after heat exchange.

[0060] Preferably, the cooling water inlet end one 44 is used to introduce the cooling water for cooling.

[0061] Preferably, the cooling water outlet end 45 is used to discharge the cooling water with increased temperature after heat exchange, so as to be further processed and recycled.

[0062] Preferably, the medium side heat exchange pipe 46 is used for the flow and heat exchange of the medium, and is made of a material with high thermal conductivity to improve the heat exchange efficiency.

[0063] Preferably, the cooling water side heat exchange pipe 47 is used for the flow and heat exchange of cooling water, and similar to the medium side heat exchange pipe 46, the cooling water side heat exchange pipe is also made of high-efficiency heat-conducting material.

[0064] Preferably, the medium side heat exchange pipe 46 and the cooling water side heat exchange pipe 47 are arranged in a spiral manner inside the shell 41. This arrangement not only increases the heat exchange area and improves the heat exchange efficiency, but also helps to reduce the volume and weight of the heat exchanger. At the same time, the spiral arrangement also helps to improve the degree of turbulence of the medium, further enhancing the heat exchange effect.

[0065] Further, the cooling water tower 1 comprises a tower body 11, a cooling fan 12 arranged above the tower body 11, a water spraying device 13 arranged inside the tower body 11 and below the cooling fan 12, and a cooling water inlet end two 14 arranged on the tower body 11.

[0066] The cooling water inlet end two 14 is connected to the backwater valve through a pipeline three.

[0067] Preferably, the cooling water tower 1 is a key equipment for cooling circulating water in a high-efficiency circulating water delivery system. It utilizes the heat exchange principle of air and water to dissipate the heat in the circulating water to the atmosphere, thereby achieving water cooling.

[0068] Preferably, the tower body 11 is the main structure of the cooling water tower 1, which provides a closed or semi-closed environment for the cooling process inside the tower body 11.

[0069] Preferably, the tower body 11 is made of corrosion-resistant and high-strength materials to ensure its long-term stable operation.

[0070] Preferably, the cooling fan 12 is a key component in the cooling process, which utilizes the principle of aerodynamics to accelerate the air flow inside the tower body 11, thereby enhancing the heat exchange efficiency of air and water.

[0071] Preferably, the speed and power of the cooling fan 12 can be adjusted according to actual needs to meet the cooling needs under different working conditions.

[0072] Preferably, the circulating water is uniformly sprayed into fine water droplets or water film by the water spraying device 13, thereby increasing the contact area of water and air and improving the heat exchange efficiency.

[0073] Further, the water collecting pool 2 is located below the water spraying device 13, and there is a distance between the water collecting pool 2 and the water spraying device 13.

[0074] Preferably, the water collecting pool 2 is used to collect the water droplets that have fallen after heat exchange, and the water collecting pool 2 maintains a certain distance from the water spraying device 13 to ensure that the water droplets have enough falling space and time for further heat exchange.

[0075] Preferably, the water in the water collecting pool 2 is pumped out by the circulating water pump 3 and re-sent to the water spraying device for cooling circulation.

[0076] Further, the circulating water pump 3 has a plurality of;

[0077] The water inlet valve 6 has a plurality of;

[0078] The water outlet valve 7 has a plurality of.

[0079] Preferably, the circulating water pump 3 is a power source for driving the circulating water to flow in the system, and the circulating water pump 3 is usually designed to be used in parallel, so that when a certain circulating water pump 3 fails, other circulating water pumps 3 can still work, ensuring the normal operation of the circulating water delivery system.

[0080] Preferably, an inlet valve 6 is arranged upstream of each circulating water pump 3, and a water outlet valve 7 is arranged downstream of each circulating water pump 3.

[0081] The specific working process of the utility model is as follows:

[0082] System start: the liquid level sensor monitors the water level of the water collecting pool 2 in real time, if the water level is normal, the PLC controller opens the bottom valve 21 and the water inlet valve 6, to ensure that the pipeline one is filled with water; the circulating water pump 3 starts, the cooling water is sucked from the water collecting pool 2 through the pipeline one, and is delivered to the heat exchanger 4 through the pipeline two; the water outlet valve 7 and the water inlet valve 8 are gradually opened according to the signal of the flow sensor two, to adjust the cooling water flow, to ensure that the heat exchanger 4 obtains enough cooling water.

[0083] Normal operation: the cooling water circulates between the water collecting pool 2, the circulating water pump 3, the heat exchanger 4 and the cooling water tower 1, to complete heat exchange.

[0084] Valve and sensor cooperative control: according to the signals of flow, hydraulic pressure, temperature and the like, the PLC controller dynamically adjusts the opening degree of each valve, to ensure stable operation of the system.

[0085] System automatic monitoring: when the flow, hydraulic pressure, temperature, liquid level and the like are monitored to be abnormal, the PLC controller operates according to the preset shutdown program, first, the water outlet valve 7 and the water inlet valve 8 are closed, to stop the circulating water from entering the heat exchanger 4, then the circulating water pump 3 is closed, to stop the circulating flow of water, finally, the water inlet valve 6 and the bottom valve 21 are closed, to cut off the connection between the water collecting pool 2 and the circulating water pump 3.

[0086] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any way. Any person skilled in the art, without departing from the technical solution of the utility model, can make any form of equivalent replacement or modification to the technical solution and technical content disclosed by the utility model, and the change still belongs to the protection scope of the utility model.

Claims

1. A high-efficiency circulating water conveying system, characterized in that, It includes a cooling tower (1), a water collection tank (2) located below the cooling tower (1), a circulating water pump (3) connected to the water collection tank (2) via a first pipe, and a heat exchanger (4) connected to the circulating water pump (3) via a second pipe. The heat exchanger (4) is also connected to the cooling tower (1) via a third pipe. The pipeline is equipped with a return valve (5), a flow sensor, and a hydraulic sensor. A water inlet valve (6) is installed on the first pipeline, and a liquid level sensor is installed inside the water collection tank (2); The second pipeline is equipped with an outlet valve (7), an inlet valve (8), and a flow sensor 2; A temperature sensor is installed on the heat exchanger (4); The flow sensor 1, the hydraulic sensor, the liquid level sensor, and the flow sensor 2 are all connected to the PLC controller.

2. The high-efficiency circulating water conveying system according to claim 1, characterized in that, The bottom of the water collection tank (2) is provided with a bottom valve (21), which is located at the outlet of the water collection tank (2) connected to the pipeline.

3. The high-efficiency circulating water conveying system according to claim 2, characterized in that, The return valve (5), the inlet valve (6), the outlet valve (7), the upper water valve (8), and the bottom valve (21) are all electric micro-resistance valves. The return valve (5), the inlet valve (6), the outlet valve (7), the upper water valve (8), and the bottom valve (21) are all connected to the PLC controller.

4. The high-efficiency circulating water conveying system according to claim 1, characterized in that, The heat exchanger (4) includes a shell (41), a medium inlet end (42) disposed on the shell (41), a medium outlet end (43) disposed on the shell (41), a cooling water inlet end (44) disposed on the shell (41), and a cooling water outlet end (45) disposed on the shell (41). The temperature sensor is disposed on the cooling water inlet end (44). A medium-side heat exchange tube (46) is provided between the medium inlet end (42) and the medium outlet end (43). A cooling water side heat exchange pipe (47) is provided between the cooling water inlet end (44) and the cooling water outlet end (45). The medium-side heat exchange tube (46) and the cooling water-side heat exchange tube (47) are arranged in a spiral pattern inside the shell (41); The cooling water outlet (44) and the return water valve (5) are connected by the pipeline.

5. The high-efficiency circulating water conveying system according to claim 1, characterized in that, The cooling tower (1) includes a tower body (11), a cooling fan (12) installed above the tower body (11), a water spraying device (13) installed inside the tower body (11) and below the cooling fan (12), and a second cooling water inlet end (14) installed on the tower body (11). The cooling water inlet end two (14) is connected to the return water valve (5) through the pipe three.

6. The high-efficiency circulating water conveying system according to claim 5, characterized in that, The water collection tank (2) is located below the water spraying device (13), and a distance is set between the water collection tank (2) and the water spraying device (13).

7. The high-efficiency circulating water conveying system according to claim 1, characterized in that, The circulating water pump (3) has multiple pumps; The inlet valve (6) has multiple valves; The outlet valve (7) has multiple valves.

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