Resistance-adjustable energy-saving cooling tower water vapor recovery and demisting device

Abstract

The invention relates to the technical field of water vapor recovery and demisting, in particular to a resistance-adjustable energy-saving cooling tower water vapor recovery and demisting device, comprising: a condensation module comprising a plurality of condensation assemblies for condensing water vapor in a cooling tower into liquid and a ventilation isolation door connected with the condensation assemblies for controlling the spatial position of the water vapor; a conveying module; an exhaust module; a detection module; the control module is used for determining the opening condition of the ventilation isolation door and the first rotating speed of the exhaust motor according to the air pressure in the cooling tower, judging the effectiveness of water vapor recovery according to the air humidity at the top of the cooling tower and the increment of the water flow in the water tank, and determining an effectiveness processing mode according to the effectiveness of water vapor recovery, and the motor rotating speed of the water delivery pump is adjusted, or the second rotating speed of the exhaust motor and the opening frequency of the ventilation isolation door are determined according to the gas flow speed in the condensation assembly. According to the invention, the effectiveness and stability of water vapor recovery are improved.

Description

Technical Field

[0001] The invention relates to the technical field of water vapor recovery and demisting, in particular to a water vapor recovery and demisting device for a cooling tower with adjustable resistance. Background Art

[0002] In the prior art, the existing technologies for energy-saving cooling tower water vapor recovery and demisting devices mainly include: using high-efficiency mist separators, setting up water vapor capture systems, optimizing cooling tower structural design, utilizing waste heat recovery technology and adopting intelligent control systems. These technologies achieve the purpose of energy conservation and emission reduction by reducing water vapor emissions, improving heat exchange efficiency and reducing energy consumption. Since a large amount of water in the cooling tower vaporizes and evaporates to form saturated wet air that is discharged into the atmosphere, the large amount of water mist also causes many environmental problems.

[0003] Chinese Patent Publication No.: CN115435610A discloses a circulating water cooling tower evaporation water vapor recovery and demisting device, including a demister, and the demister includes: at least two parallel and staggered baffles, each of the baffles includes at least two first straight plates and at least one first bent portion, the first straight plates are staggeredly connected with the first bent portion, and the first bent portion forms an inner concave portion and an outer convex portion on both sides of the baffle respectively; the two adjacent baffles are enclosed to form a demisting channel, and in the two adjacent staggered baffles, the connection between the first straight plate and the first bent portion of one baffle is connected to the other baffle. The first straight plate or the first bent portion of the baffle corresponds to the first straight plate or the first bent portion of the baffle; a plurality of flow limiting components are arranged in the defogger channel in a head-to-tail manner, each of the flow limiting components includes an independently rotatable flow limiting plate, and each of the flow limiting plates includes a second straight plate and a second bent portion connected to each other; the flow limiting plate divides the defogger channel into two parts, one of which is a closed part and the other is a conducting part, the convex side of the second bent portion faces the conducting part, and the second bent portion also corresponds to the concave portion of the baffle located on one side of the conducting part, and the conducting area of ​​the conducting part is changed by rotating the flow limiting plate. It can be seen from this that the evaporative water vapor recovery defogger device of the circulating water cooling tower has the problems of reduced cooling effectiveness due to the small cooling space, reduced condensed water reflux effect due to the vibration of the water vapor recovery device when the water vapor pressure is too high, thereby reducing the water vapor recovery effectiveness, and reduced stability of water vapor recovery due to the loss of exhaust blades in the cooling tower. Summary of the invention

[0004] To this end, the present invention provides a resistance-adjustable energy-saving cooling tower water vapor recovery and defogger device to overcome the problems in the prior art of reduced cooling efficiency due to small cooling space, reduced condensate reflux effect due to vibration of the water vapor recovery device when the water vapor pressure is too high, thereby reducing water vapor recovery efficiency, and reduced stability of water vapor recovery due to loss of exhaust blades in the cooling tower.

[0005] To achieve the above object, the present invention provides a resistance adjustable energy cooling tower water vapor recovery and demisting device, comprising:

[0006] A condensation module connected to the cooling tower, comprising a plurality of condensation components for condensing water vapor in the cooling tower into liquid and ventilation isolation doors connected to the condensation components for controlling the spatial position of the water vapor. For a single condensation component that does not form an axially symmetrical pattern with an adjacent condensation component, two adjacent condensation components in front and behind are arranged in an axially symmetrical manner;

[0007] A conveying module, which is arranged below the condensing module and is used to convey the liquid to a target location, and includes a water conveying pump for providing power for conveying the liquid;

[0008] An exhaust module, which is arranged above the condensation module and is used to discharge uncondensed water vapor, and includes an exhaust motor for providing exhaust power;

[0009] A detection module, which is respectively connected to the cooling tower, the condensation module and the conveying module, and is used to detect characteristic parameters of water vapor;

[0010] A control module, which is respectively connected to the condensation module, the conveying module, the exhaust module and the detection module, is used to determine the opening condition of the ventilation isolation door and the first speed of the exhaust motor according to the air pressure in the cooling tower, judge the effectiveness of water vapor recovery according to the air humidity at the top of the cooling tower and the increase in the water flow in the water tank, and determine the effectiveness processing method according to the effectiveness of the water vapor recovery, including:

[0011] The motor speed of the water delivery pump is adjusted, or the second speed of the exhaust motor and the opening frequency of the ventilation isolation door are determined according to the gas flow rate in the condensation component.

[0012] Furthermore, the condensation component comprises:

[0013] A condenser pipe, both ends of which pass through the side wall of the cooling tower to provide a condensation space for heat exchange between cold air and water vapor;

[0014] A cold air blower, which is arranged on the outer wall of the cooling tower and is used to pass cold air into the condenser pipe;

[0015] Wherein, the condenser is in a V-shape with the opening facing upward.

[0016] Furthermore, the conveying module also includes a water collecting tank arranged below the cooling assembly for collecting condensed water.

[0017] Furthermore, the detection module includes:

[0018] A pressure sensor is disposed below the condenser tube to detect the air pressure in the space below the cooling assembly;

[0019] An air humidity sensor is arranged at the top of the cooling tower to detect the air humidity at the top of the cooling tower;

[0020] A flow rate sensor, which is arranged on the inner wall of the condenser tube and is used to detect the gas flow rate in the condenser tube;

[0021] A liquid level meter, which is arranged on the inner wall of the water collecting tank and is used to detect the water flow height in the water collecting tank;

[0022] The water vapor characteristic parameters include the air pressure in the space below the cooling assembly, the air humidity at the top of the cooling tower, the gas flow rate in the condenser tube, and the water flow height in the water collecting tank.

[0023] Furthermore, the control module is respectively connected to the pressure sensor and the exhaust motor to obtain the air pressure of the space below the cooling assembly. If the air pressure reaches the opening condition of the ventilation isolation door, the ventilation isolation door is opened and the speed of the exhaust motor is increased to the first speed.

[0024] Among them, the opening condition of the ventilation isolation door is that the air pressure is greater than a preset first air pressure; and the first rotation speed of the exhaust motor is positively correlated with the air pressure.

[0025] Furthermore, the control module and the air humidity sensor are used to obtain the air humidity when the ventilation isolation door does not meet the opening conditions. If the air humidity is greater than a preset air humidity, it is determined that the effectiveness of the water vapor recovery does not meet the requirements.

[0026] Further, the control module is connected to the pressure sensor and the delivery pump respectively, so as to obtain the air pressure of the space below the cooling component when the effectiveness of the water vapor recovery does not meet the requirements, and if the air pressure is greater than the preset second air pressure and less than or equal to the preset first air pressure, it is determined that the stability of the cooling component does not meet the requirements, and the motor speed of the delivery pump is reduced;

[0027] Wherein, the reduction range of the motor speed of the delivery pump is positively correlated with the air pressure.

[0028] Furthermore, the control module is connected to the liquid level meter to obtain the water flow height in the water collecting tank when the effectiveness of the water vapor recovery does not meet the requirements. If the water flow height is less than a preset water flow height, it is determined that the effectiveness of the water vapor recovery in the cooling tower does not meet the requirements.

[0029] Furthermore, the control module, the flow rate sensor and the exhaust motor are used to obtain the gas flow rate in the condenser when the effectiveness of water vapor recovery in the cooling tower does not meet the requirements. If the gas flow rate is greater than a preset gas flow rate, it is determined that the rotation stability of the exhaust blade does not meet the requirements, and the rotation speed of the exhaust motor is increased to a second rotation speed;

[0030] Wherein, the second rotation speed of the exhaust motor is positively correlated with the gas flow rate.

[0031] Furthermore, the control module is connected to the liquid level meter and the ventilation isolation door respectively, so as to increase the opening frequency of the ventilation isolation door according to the change of the water flow height within a unit cycle when the second speed of the exhaust motor is increased;

[0032] The change in water flow height is the difference between the water flow height at the end of the unit cycle and the preset water flow height;

[0033] Among them, the increase in the opening frequency of the ventilation isolation door is positively correlated with the change in the water flow height.

[0034] Compared with the prior art, the beneficial effect of the present invention lies in that the device of the present invention realizes effective recovery and defog of water vapor in the cooling tower by setting a condensation module, a conveying module, an exhaust module, a detection module and a control module, thereby improving the cooling efficiency and energy utilization rate; by accurately controlling the opening conditions of the ventilation isolation door and the rotation speed of the exhaust motor, the present invention can dynamically adjust the working parameters according to the actual working conditions in the cooling tower, thereby achieving the purpose of energy saving, and the introduction of the detection module enables the system to monitor the water vapor characteristic parameters in real time, further optimizes the water vapor recovery process, and through the intelligent adjustment of the control module, ensures the operation efficiency of the cooling tower and the stability of water vapor recovery; by setting a condensation component and a ventilation isolation door, the condensation area is increased, and the problem of setting a condensation module without increasing the water vapor resistance outside the cooling tower is solved, thereby realizing effective condensation of water vapor and reducing the energy consumption of the cooling tower; by setting a conveying module, the condensed water can be transported to a specified position, avoiding the secondary evaporation of water, and further improving the utilization rate of water; by setting an exhaust module, the air circulation inside the cooling tower is guaranteed, and the discharge of water vapor is effectively controlled, reducing the impact of the water vapor environment.

[0035] Furthermore, the device described in the present invention provides a condenser, and the V-shaped condenser design facilitates the rapid condensation and smooth flow of water vapor, avoiding the accumulation of water vapor in the condenser, thereby improving the defog effect, and at the same time increasing the thickness of the condensation component, using the three-dimensional space to increase the plane area, increasing the heat exchange area of ​​water vapor, and achieving improved efficiency of water vapor condensation.

[0036] Furthermore, the device described in the present invention sets the opening conditions of the ventilation isolation door and the first speed of the exhaust motor. During the operation of the cooling tower, the control module monitors the data of the pressure sensor in real time to ensure that the opening of the ventilation isolation door and the adjustment of the exhaust motor speed can respond to the pressure changes in the cooling tower in a timely manner. When it is detected that the air pressure in the cooling tower exceeds the preset value, the ventilation isolation door will automatically open and the speed of the exhaust motor will increase accordingly to maintain the air flow and pressure balance in the cooling tower, thereby improving the cooling efficiency and reducing energy consumption.

[0037] Furthermore, the device described in the present invention sets a preset second air pressure. Due to the increase in resistance caused by the increase in water vapor pressure below the condensation module, the water vapor resistance is reduced by controlling the opening conditions of the ventilation isolation door. At the same time, the contact area between water vapor and cold air is increased, thereby improving the effectiveness of defogger. Since vibration is generated when the water vapor pressure is too high, the stability of the condensed water is reduced and the heat absorbed is increased when it falls. By adjusting the motor speed of the water delivery pump, the water flow height is increased, and the secondary evaporation during the falling process of the condensed water is reduced, thereby further increasing the stability of the condensed water falling.

[0038] Furthermore, the device described in the present invention sets a preset water flow height and a preset gas flow rate. When low water vapor recovery efficiency is detected, the system will automatically adjust the rotation speed of the exhaust motor, thereby improving cooling efficiency and reducing energy waste. Due to the loss of exhaust blades in the cooling tower or the unstable connection of the exhaust blade shaft, there is a difference between the rotation rate of the exhaust blades and the actual rotation rate, which leads to an increase in the contact time between water vapor and the exhaust blades. The water vapor condenses on the exhaust blades and falls into the space between the condensation pipe and the ventilation isolation door, which increases the pressure of the condensation module. By increasing the exhaust blade rotation speed, the cooling efficiency is restored. By increasing the opening frequency of the ventilation isolation door, the pressure of the condensation component is reduced, thereby further achieving an increase in the stability of the condensation module and an increase in the condensation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an overall structural diagram of a water vapor recovery and demisting device for a cooling tower with adjustable resistance according to an embodiment of the present invention;

[0040] Figure 2 This is an overall structural block diagram of a water vapor recovery and demisting device for a cooling tower with adjustable resistance according to an embodiment of the present invention;

[0041] Figure 3 This is a structural block diagram of a detection module of a water vapor recovery and demisting device for a cooling tower with adjustable resistance according to an embodiment of the present invention;

[0042] Figure 4 This is a structural block diagram of a cooling component of a water vapor recovery and demisting device of a cooling tower with adjustable resistance according to an embodiment of the present invention;

[0043] Explanation of the accompanying figures: 1-cold air fan, 2-condenser, 3-cold air duct, 4-ventilation isolation door, 5-ventilation port, 6-cooling tower, 7-liquid level gauge, 8-pressure sensor, 9-flow rate sensor, 10-water collecting tank, 11-water pump, 12-exhaust motor, 13-air humidity sensor, 14-exhaust blade. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0046] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0047] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, they are respectively an overall structural diagram, an overall structural block diagram, a detection module structural block diagram and a cooling component structural block diagram of a water vapor recovery and demisting device for a resistance adjustable energy cooling tower according to an embodiment of the present invention. A water vapor recovery and demisting device for a resistance adjustable energy cooling tower according to the present invention comprises:

[0049] A condensation module connected to the cooling tower 6, comprising a plurality of condensation components for condensing water vapor in the cooling tower 6 into liquid and a ventilation isolation door 4 connected to the condensation components for controlling the spatial position of the water vapor. For a single condensation component that does not form an axially symmetrical pattern with an adjacent condensation component, two adjacent condensation components in front and behind are arranged in an axially symmetrical manner;

[0050] A conveying module, which is arranged below the condensing module and is used to convey the liquid to a target location, and includes a water conveying pump 11 for providing liquid conveying power;

[0051] An exhaust module, which is arranged above the condensation module and is used to discharge uncondensed water vapor, and includes an exhaust motor 12 for providing exhaust power;

[0052] A detection module, which is respectively connected to the cooling tower 6, the condensation module and the conveying module, and is used to detect characteristic parameters of water vapor;

[0053] A control module, which is respectively connected to the condensation module, the conveying module, the exhaust module and the detection module, is used to determine the opening condition of the ventilation isolation door 4 and the first speed of the exhaust motor 12 according to the air pressure in the cooling tower 6, judge the effectiveness of water vapor recovery according to the air humidity at the top of the cooling tower 6 and the increase in the water flow in the water tank, and determine the effectiveness processing method according to the effectiveness of the water vapor recovery, including:

[0054] The motor speed of the water delivery pump 11 is adjusted, or the second speed of the exhaust motor 12 and the opening frequency of the ventilation isolation door 4 are determined according to the gas flow rate in the condensation component.

[0055] Specifically, the ventilation isolation door 4 is opened and closed by a ventilation motor (not shown).

[0056] Specifically, exhaust blades 14 are arranged above the condensation module.

[0057] In practice, the beneficial effect of the present invention is that the device of the present invention realizes effective recovery and defog of water vapor in the cooling tower 6 by setting a condensation module, a conveying module, an exhaust module, a detection module and a control module, thereby improving the cooling efficiency and energy utilization rate; by accurately controlling the opening conditions of the ventilation isolation door 4 and the rotation speed of the exhaust motor 12, the present invention can dynamically adjust the working parameters according to the actual working conditions in the cooling tower 6, thereby achieving the purpose of energy saving, and the introduction of the detection module enables the system to monitor the water vapor characteristic parameters in real time, further optimizes the water vapor recovery process, and through the intelligent adjustment of the control module, ensures the operation efficiency of the cooling tower 6 and the stability of water vapor recovery; by setting the condensation assembly and the ventilation isolation door 4, the condensation area is increased, and the problem of setting the condensation module without increasing the water vapor resistance outside the cooling tower 6 is solved, and the effective condensation of water vapor is realized, and the energy consumption of the cooling tower 6 is reduced; by setting the conveying module, the condensed water can be transported to the specified position, avoiding the secondary evaporation of water, and further improving the utilization rate of water; by setting the exhaust module, the air circulation inside the cooling tower 6 is guaranteed, and the discharge of water vapor is effectively controlled, reducing the impact of the water vapor environment.

[0058] Specifically, the condensation component includes:

[0059] The condenser pipe 2 has two ends passing through the side wall of the cooling tower 6 to provide a condensation space for heat exchange between cold air and water vapor;

[0060] A cold air blower 1, which is arranged on the outer wall of the cooling tower 6 and is used to pass cold air into the condenser tube 2;

[0061] The condenser tube 2 is in a V-shape with its opening facing upward.

[0062] Specifically, a vent 5 is provided between adjacent condensation components, and the vent 5 is in the form of a 45° channel angle.

[0063] Specifically, the inner space below the condenser tube 2 near the water collecting tank 10 is a cold air passage 3 through which the cold air blower 1 introduces cold air into the condenser tube 2 .

[0064] In practice, the device of the present invention sets a condenser 2. The V-shaped design of the condenser 2 helps the rapid condensation and smooth flow of water vapor, avoiding the accumulation of water vapor in the condenser 2, thereby improving the defog effect. At the same time, the thickness of the condensation component is increased, and the three-dimensional space is used to increase the area of ​​the plane, thereby increasing the heat exchange area of ​​water vapor, thereby improving the efficiency of water vapor condensation.

[0065] Specifically, the conveying module further includes a water collecting tank 10 disposed below the cooling assembly for collecting condensed water.

[0066] Specifically, the detection module includes:

[0067] A pressure sensor 8, which is arranged below the condenser 2 and is used to detect the air pressure in the space below the cooling assembly;

[0068] An air humidity sensor 13, which is arranged at the top of the cooling tower 6, for detecting the air humidity at the top of the cooling tower 6;

[0069] A flow rate sensor 9, which is arranged on the inner wall of the condenser tube 2 and is used to detect the gas flow rate in the condenser tube 2;

[0070] A liquid level meter 7, which is arranged on the inner wall of the water collecting tank 10, and is used to detect the water flow height in the water collecting tank 10;

[0071] The water vapor characteristic parameters include the air pressure in the space below the cooling assembly, the air humidity at the top of the cooling tower 6 , the gas flow rate in the condenser 2 , and the water flow height in the water collecting tank 10 .

[0072] Specifically, the control module is connected to the pressure sensor 8 and the exhaust motor 12 respectively to obtain the air pressure of the space below the cooling component. If the air pressure reaches the opening condition of the ventilation isolation door 4, the ventilation isolation door 4 is opened and the speed of the exhaust motor 12 is increased to the first speed.

[0073] The opening condition of the ventilation isolation door 4 is that the air pressure is greater than a preset first air pressure; and the first rotation speed of the exhaust motor 12 is positively correlated with the air pressure.

[0074] Specifically, the general value range of the preset first air pressure is [0.42MPa, 0.48MPa].

[0075] Preferably, the preferred embodiment of the preset first gas pressure is 0.45 MPa.

[0076] In implementation, for every 0.01 MPa difference between the air pressure and the preset first air pressure, the speed of the exhaust motor 12 is increased by 30 rpm as the first speed. For example, the air pressure in the space below the cooling component is 0.47 MPa. At this time, the speed of the exhaust motor 12 is 750 rpm, and the first speed is 750 rpm+30 rpm×2=810 rpm.

[0077] In practice, the device of the present invention sets the opening conditions of the ventilation isolation door 4 and the first speed of the exhaust motor 12. During the operation of the cooling tower 6, the control module monitors the data of the pressure sensor 8 in real time to ensure that the opening of the ventilation isolation door 4 and the adjustment of the speed of the exhaust motor 12 can respond to the pressure changes in the cooling tower 6 in a timely manner. When it is detected that the air pressure in the cooling tower 6 exceeds the preset value, the ventilation isolation door 4 will automatically open, and the speed of the exhaust motor 12 will increase accordingly to maintain the air flow and pressure balance in the cooling tower 6, thereby improving the cooling efficiency and reducing energy consumption.

[0078] Specifically, the control module and the air humidity sensor 13 are used to obtain the air humidity when the ventilation isolation door 4 does not meet the opening condition. If the air humidity is greater than the preset air humidity, it is determined that the effectiveness of the water vapor recovery does not meet the requirements.

[0079] Specifically, the general value range of the preset air humidity is [92%, 94%].

[0080] Preferably, the preset air humidity is 93%.

[0081] Specifically, the control module is connected to the pressure sensor 8 and the delivery pump respectively, so as to obtain the air pressure of the space below the cooling component when the effectiveness of the water vapor recovery does not meet the requirements. If the air pressure is greater than the preset second air pressure and less than or equal to the preset first air pressure, it is determined that the stability of the cooling component does not meet the requirements, and the motor speed of the delivery pump is reduced;

[0082] Wherein, the reduction range of the motor speed of the delivery pump is positively correlated with the air pressure.

[0083] Specifically, the general value range of the preset first air pressure is [0.28MPa, 0.32MPa].

[0084] Preferably, the preferred embodiment of the preset first air pressure is 0.3 MPa.

[0085] During implementation, when the difference between the air pressure and the preset second air pressure is 0.01MPa, the motor speed of the delivery pump is reduced to 0.9 times the original speed; when the difference between the air pressure and the preset second air pressure exceeds 0.01MPa, the motor speed of the delivery pump is reduced by 200rpm for every 0.01MPa. For example, the air pressure in the space below the cooling component is 0.32MPa, and the current motor speed of the delivery pump is 4000rpm, then the motor speed of the delivery pump is reduced to 4000rpm×0.9-200rpm=3400rpm.

[0086] In practice, the device of the present invention sets a preset second air pressure. Due to the increase in resistance caused by the increase in water vapor pressure below the condensation module, the water vapor resistance is reduced by controlling the opening conditions of the ventilation isolation door 4. At the same time, the contact area between water vapor and cold air is increased, thereby improving the effectiveness of defogger. Since vibration is generated when the water vapor pressure is too high, the stability of the condensed water is reduced and the heat absorption is increased when it falls. By adjusting the motor speed of the water delivery pump 11, the water flow height is increased, and the secondary evaporation during the falling process of the condensed water is reduced, thereby further achieving an increase in the stability of the condensed water falling.

[0087] Specifically, the control module is connected to the liquid level meter 7 to obtain the water flow height in the water collecting tank 10 when the effectiveness of the water vapor recovery does not meet the requirements. If the water flow height is less than the preset water flow height, it is determined that the effectiveness of the water vapor recovery in the cooling tower 6 does not meet the requirements.

[0088] Specifically, the general value range of the preset water flow height is [0.2m, 0.36m].

[0089] Preferably, the preferred embodiment of the preset water flow height is 0.3 m.

[0090] Specifically, the control module, the flow rate sensor 9 and the exhaust motor 12 are used to obtain the gas flow rate in the condenser 2 when the effectiveness of water vapor recovery in the cooling tower 6 does not meet the requirements. If the gas flow rate is greater than the preset gas flow rate, it is determined that the rotation stability of the exhaust blade 14 does not meet the requirements, and the speed of the exhaust motor 12 is increased to the second speed;

[0091] The second rotation speed of the exhaust motor 12 is positively correlated with the gas flow rate.

[0092] Specifically, the general value range of the preset gas flow rate is [3.6m / s, 4m / s].

[0093] Preferably, the preferred embodiment of the preset gas flow rate is 3.8 m / s.

[0094] In implementation, for every 0.1 m / s difference between the gas flow rate and the preset gas flow rate, the speed of the exhaust motor 12 is increased by 10 rpm as the first speed. For example, the gas flow rate in the condenser 2 is 4 m / s, and the speed of the exhaust motor 12 is 800 rpm. Then the first speed is 800 rpm+10 rpm×2=820 rpm.

[0095] Specifically, the control module is connected to the liquid level meter 7 and the ventilation isolation door 4 respectively, so as to increase the opening frequency of the ventilation isolation door 4 according to the change of the water flow height within a unit cycle when the second speed of the exhaust motor 12 is increased;

[0096] The change in water flow height is the difference between the water flow height at the end of the unit cycle and the preset water flow height;

[0097] The increase in the opening frequency of the ventilation isolation door 4 is positively correlated with the change in the water flow height.

[0098] During implementation, when the change in water flow height is within [0, 0.05m], the opening frequency of the ventilation isolation door 4 increases by 2 times / minute. When the change in water flow height exceeds 0.05m, the opening frequency of the ventilation isolation door 4 increases by 1 time / minute for every 0.02m exceeded. For example, when the change in water flow height is 0.07m, the opening frequency of the ventilation isolation door 4 increases to 2 times / minute + 1 time / minute = 3 times / minute.

[0099] In practice, the device of the present invention sets a preset water flow height and a preset gas flow rate. When it detects that the water vapor recovery efficiency is low, the system will automatically adjust the rotation speed of the exhaust motor 12, thereby improving the cooling efficiency and reducing energy waste. Due to the loss of the exhaust blades 14 in the cooling tower 6 or the unstable connection of the rotating shaft of the exhaust blades 14, there is a difference between the rotation rate of the exhaust blades 14 and the actual rotation rate, which leads to an increase in the contact time between the water vapor and the exhaust blades 14. The water vapor condenses on the exhaust blades 14 and falls into the space between the condensation pipe 2 and the ventilation isolation door 4, which increases the pressure of the condensation module. By increasing the rotation speed of the exhaust blades 14, the cooling efficiency is restored. By increasing the opening frequency of the ventilation isolation door 4, the pressure of the condensation component is reduced, and the stability of the condensation module and the condensation efficiency are further increased.

[0100] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A resistance adjustable energy cooling tower water vapor recovery and demisting device, characterized in that: include: A condensation module connected to the cooling tower, comprising a plurality of condensation components for condensing water vapor in the cooling tower into liquid and ventilation isolation doors connected to the condensation components for controlling the spatial position of the water vapor. For a single condensation component that does not form an axially symmetrical pattern with an adjacent condensation component, two adjacent condensation components in front and behind are arranged in an axially symmetrical manner; A conveying module, which is arranged below the condensing module and is used to convey the liquid to a target location, and includes a water conveying pump for providing power for conveying the liquid; An exhaust module, which is arranged above the condensation module and is used to discharge uncondensed water vapor, and includes an exhaust motor for providing exhaust power; A detection module, which is respectively connected to the cooling tower, the condensation module and the conveying module, and is used to detect characteristic parameters of water vapor; A control module, which is respectively connected to the condensation module, the conveying module, the exhaust module and the detection module, is used to determine the opening condition of the ventilation isolation door and the first speed of the exhaust motor according to the air pressure in the cooling tower, judge the effectiveness of water vapor recovery according to the air humidity at the top of the cooling tower and the increase in the water flow in the water tank, and determine the effectiveness processing method according to the effectiveness of the water vapor recovery, including: The motor speed of the water delivery pump is adjusted, or the second speed of the exhaust motor and the opening frequency of the ventilation isolation door are determined according to the gas flow rate in the condensation component.

2. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 1 is characterized in that: The condensing assembly comprises: A condenser pipe, both ends of which pass through the side wall of the cooling tower to provide a condensation space for heat exchange between cold air and water vapor; A cold air blower, which is arranged on the outer wall of the cooling tower and is used to pass cold air into the condenser pipe; Wherein, the condenser is in a V-shape with the opening facing upward.

3. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 2 is characterized in that: The conveying module also includes a water collecting tank arranged below the cooling assembly for collecting condensed water.

4. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 3 is characterized in that: The detection module comprises: A pressure sensor is disposed below the condenser tube to detect the air pressure in the space below the cooling assembly; An air humidity sensor is arranged at the top of the cooling tower to detect the air humidity at the top of the cooling tower; A flow rate sensor, which is arranged on the inner wall of the condenser tube and is used to detect the gas flow rate in the condenser tube; A liquid level meter, which is arranged on the inner wall of the water collecting tank and is used to detect the water flow height in the water collecting tank; The water vapor characteristic parameters include the air pressure in the space below the cooling assembly, the air humidity at the top of the cooling tower, the gas flow rate in the condenser tube, and the water flow height in the water collecting tank.

5. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 4 is characterized in that: The control module is respectively connected to the pressure sensor and the exhaust motor to obtain the air pressure of the space below the cooling assembly. If the air pressure reaches the opening condition of the ventilation isolation door, the ventilation isolation door is opened and the speed of the exhaust motor is increased to the first speed; Among them, the opening condition of the ventilation isolation door is that the air pressure is greater than a preset first air pressure; and the first rotation speed of the exhaust motor is positively correlated with the air pressure.

6. The water vapor recovery and demisting device for a cooling tower with adjustable resistance according to claim 5 is characterized in that: The control module and the air humidity sensor are used to obtain the air humidity when the ventilation isolation door does not meet the opening condition. If the air humidity is greater than the preset air humidity, it is determined that the effectiveness of the water vapor recovery does not meet the requirements.

7. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 6 is characterized in that: The control module is connected to the pressure sensor and the delivery pump respectively, and is used to obtain the air pressure of the space below the cooling component when the effectiveness of the water vapor recovery does not meet the requirements. If the air pressure is greater than the preset second air pressure and less than or equal to the preset first air pressure, it is determined that the stability of the cooling component does not meet the requirements, and the motor speed of the delivery pump is reduced; Wherein, the reduction range of the motor speed of the delivery pump is positively correlated with the air pressure.

8. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 7 is characterized in that: The control module is connected to the liquid level meter to obtain the water flow height in the water collecting tank when the effectiveness of the water vapor recovery does not meet the requirements. If the water flow height is less than the preset water flow height, it is determined that the effectiveness of the water vapor recovery in the cooling tower does not meet the requirements.

9. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 8, characterized in that: The control module, the flow rate sensor and the exhaust motor are used to obtain the gas flow rate in the condenser when the effectiveness of water vapor recovery in the cooling tower does not meet the requirements. If the gas flow rate is greater than the preset gas flow rate, it is determined that the rotation stability of the exhaust blade does not meet the requirements, and the rotation speed of the exhaust motor is increased to a second rotation speed; Wherein, the second rotation speed of the exhaust motor is positively correlated with the gas flow rate.

10. The water vapor recovery and demisting device of the cooling tower with adjustable resistance according to claim 9, characterized in that: The control module is connected to the liquid level meter and the ventilation isolation door respectively, and is used to increase the opening frequency of the ventilation isolation door according to the change of the water flow height within a unit cycle when the second speed of the exhaust motor is increased; The change in water flow height is the difference between the water flow height at the end of the unit cycle and the preset water flow height; Among them, the increase in the opening frequency of the ventilation isolation door is positively correlated with the change in the water flow height.

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