Wet bulb temperature detection device and cooling tower proximity monitoring system

Abstract

The present disclosure relates to a wet bulb temperature detection device and a cooling tower approach monitoring system, the wet bulb temperature detection device comprising a container, gauze and a thermometer; the container is used for storing liquid, the bottom end of the outer side wall of the container is provided with a thin tube, the thin tube is communicated with the container, so that the liquid in the container can flow into the thin tube, the end of the thin tube away from the container is upward, the gauze is placed in the thin tube, and part of the gauze is stretched out through the end of the thin tube away from the container and wraps the detection end of the thermometer, so that the thermometer can detect the wet bulb temperature. The wet bulb temperature detection device draws out the liquid by setting the thin tube on the outer side wall of the container, the contact area of the thin tube with the outside world is small, and the amount of liquid in the thin tube is also small, so that the evaporation speed of the liquid in the thin tube is slow, thereby greatly reducing the consumption speed of the liquid in the container, and the personnel does not need to frequently add water.

Description

Technical Field

[0001] This disclosure relates to the field of wet-bulb temperature detection technology, specifically to a wet-bulb temperature detection device and a cooling tower proximity monitoring system. Background Technology

[0002] Wet-bulb temperature is a key parameter for the cooling capacity of a reactive cooling tower. It refers to the lowest temperature that can be reached in the current environment by evaporating water. The main measurement method is to wrap one end of a gauze around the temperature probe of a thermometer and put the other end of the gauze into water.

[0003] Current wet-bulb temperature detection devices typically use open containers to hold water, allowing gauze to be placed inside and soaked. However, water evaporates quickly in open containers, requiring frequent refills. This results in very short detection cycles, necessitates frequent manual inspections and refills, leading to high workloads and increasing the probability of forgetting to add water. Summary of the Invention

[0004] The purpose of this disclosure is to provide a wet-bulb temperature detection device and a cooling tower proximity monitoring system to solve the problem of frequent water addition required by existing wet-bulb temperature detection devices.

[0005] To achieve the above objectives, one aspect of this disclosure provides a wet-bulb temperature detection device, including a container, gauze, and a thermometer;

[0006] The container is used to store liquid. A thin tube is provided at the bottom of the outer wall of the container. The thin tube is connected to the container so that the liquid in the container can flow into the thin tube. The end of the thin tube away from the container faces upward. The gauze is placed inside the thin tube, and part of the gauze extends out through the end of the thin tube away from the container and wraps around the sensing end of the thermometer so that the thermometer can detect the wet-bulb temperature.

[0007] Optionally, the gauze is constructed as a strip, and the gauze inside the capillary is closely attached to the inner wall of the capillary and extends along the length of the capillary.

[0008] Optionally, the capillary tube has an "L" shaped structure, a circular cross-section, and an inner diameter of 5mm-10mm.

[0009] Optionally, the container includes a box body and a top cover. The top of the box body is an open structure. The top cover can be placed on the top of the box body and close the top of the box body. A sealing plug is provided on the side of the top cover facing the top of the box body. The sealing plug is used to seal the joint between the top cover and the top of the box body. A handle is formed on the top cover.

[0010] Optionally, the upper cover has a pressure balancing hole that penetrates the upper cover, and the sealing plug has a connecting hole that penetrates the sealing plug. The connecting hole is connected to the pressure balancing hole, and the pressure balancing hole is configured to guide outside air into the box so that the air pressure inside the box is in a balanced state with the outside air pressure.

[0011] Optionally, the diameter of both the pressure balancing hole and the connecting hole is 1-3 mm.

[0012] Optionally, the wet-bulb temperature detection device further includes a Stevenson screen and a fixed support. The fixed support, the container, and the thermometer are all disposed inside the Stevenson screen. The thermometer is connected to the fixed support so that the thermometer is located above the end of the thin tube away from the container.

[0013] Optionally, the wet-bulb temperature detection device further includes a data acquisition unit, wherein the thermometer is an electronic thermometer, the data acquisition unit is electrically connected to the electronic thermometer, the data acquisition unit is used to acquire the temperature data of the electronic thermometer, and the data acquisition unit is used to be electrically connected to a terminal.

[0014] Optionally, the liquid in the container includes water or glass cleaner.

[0015] A second aspect of this disclosure also provides a cooling tower proximity monitoring system, including a cooling tower, a dry-bulb temperature detection device, and the aforementioned wet-bulb temperature detection device. The wet-bulb temperature detection device is disposed at the air inlet of the cooling tower to detect the air inlet temperature of the cooling tower, and the dry-bulb temperature detection device is disposed at the water outlet of the cooling tower to detect the water outlet temperature of the cooling tower.

[0016] The above technical solution uses a thin tube installed on the outer wall of the container to draw out the liquid, allowing the liquid to evaporate only through this tube. Since the contact area between the thin tube and the outside is small, and the amount of liquid within the tube is also small, the evaporation rate is slow, significantly reducing the rate of liquid consumption within the container. This wet-bulb temperature detection device extends the detection cycle by reducing the evaporation rate, eliminating the need for frequent water refills and greatly reducing the frequency of adding liquid to the container. This reduces the workload for personnel, and the reduced frequency of liquid additions also lowers the probability of forgetting to add liquid, thus improving the error tolerance and ensuring accurate wet-bulb temperature detection.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a wet-bulb temperature detection device according to one embodiment of the present disclosure;

[0020] Figure 2 This is one embodiment of the present disclosure. Figure 1 An enlarged view of position A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of a container according to one embodiment of the present disclosure.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Stevenson screen; 2. Container; 201. Box body; 202. Top cover; 3. Thermometer; 4. Gauze; 5. Fixing bracket; 6. Connecting hole; 7. Air pressure balance hole; 8. Thin tube; 9. Sealing plug; 10. Handle; 11. Ventilation grille; 12. Liquid level gauge; 13. Liquid. Detailed Implementation

[0024] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0025] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are generally used to define the orientation of the accompanying drawings, and "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0027] Cooling towers are key equipment in industrial water systems, transferring heat from wastewater to the atmosphere. The cooling performance of a cooling tower directly affects the output and operational safety of power plant units. Cooling tower proximity refers to the difference between the water temperature after cooling in the cooling tower and the ambient wet-bulb temperature. Cooling tower proximity directly reflects the cooling performance of a cooling tower, therefore, its detection is of great significance.

[0028] Wet-bulb temperature is a key parameter for the cooling capacity of a reactive cooling tower. Wet-bulb temperature refers to the lowest temperature that can be reached in the current environment by evaporating water. The main measurement method is to wrap one end of the gauze 4 around the temperature probe of the thermometer 3 and put the other end of the gauze 4 into water.

[0029] There are three common devices for measuring wet-bulb temperature. The first is a mechanical ventilated hygrometer, which is a portable device for testing wet-bulb temperature. However, it is only a portable measurement device, and it requires an operator to operate it during actual measurement, which is very inconvenient. In addition, the measured data fluctuates greatly, which is not conducive to long-term monitoring of wet-bulb temperature.

[0030] The second method uses a hygrometer to measure the relative humidity of the air and then calculates the wet-bulb temperature based on the measured dry-bulb temperature and atmospheric pressure. However, hygrometers are very sensitive, and the measured relative humidity fluctuates greatly and frequently, resulting in large and frequent fluctuations in the calculated wet-bulb temperature. This makes it impossible to accurately obtain the wet-bulb temperature. In addition, the calculation and deduction process is cumbersome and not conducive to long-term wet-bulb temperature monitoring.

[0031] The third type of wet-bulb temperature detection device generally uses an open container 2 to hold water, so that gauze 4 can be placed in the container 2 and the water in the container 2 can wet the gauze 4. However, the water in the open container 2 evaporates quickly, requiring frequent addition of water to the open container 2, resulting in a very short detection cycle. It also requires frequent manual inspection and water addition, leading to high workload for personnel and increasing the probability of forgetting to add water, resulting in a high error rate and affecting the detection of wet-bulb temperature.

[0032] Therefore, such as Figures 1-3 As shown, one aspect of this disclosure provides a wet-bulb temperature detection device, including a container 2, gauze 4, and a thermometer 3.

[0033] Container 2 is used to store liquid 13. A thin tube 8 is provided at the bottom of the outer wall of container 2. The thin tube 8 is connected to container 2 so that the liquid 13 in container 2 can flow into the thin tube 8. The end of the thin tube 8 away from container 2 faces upward. Gauze 4 is placed in the thin tube 8, and part of the gauze 4 extends out through the end of the thin tube 8 away from container 2 and wraps the detection end of thermometer 3 so that thermometer 3 can detect wet bulb temperature.

[0034] The capillary tube 8 is located outside the container 2. The capillary tube 8 is used to draw out the liquid 13 inside the container 2, so that the gauze 4 placed inside the capillary tube 8 can be soaked, so that the detection end of the thermometer 3 can detect the wet bulb temperature.

[0035] The capillary tube 8 is connected to the bottom end of the outer wall of the container 2, so that when the liquid 13 in the container 2 evaporates through the capillary tube 8 and the liquid level of the liquid 13 in the container 2 drops, the capillary tube 8 can still contain liquid 13. The end of the capillary tube 8 away from the container 2 faces upward, so that the liquid 13 can be kept in the capillary tube 8 and will not flow out of the capillary tube 8, thereby maintaining the wetting effect on the gauze 4.

[0036] In the above technical solution, a thin tube 8 is installed on the outer wall of container 2 to lead out liquid 13. This allows liquid 13 to evaporate only through the thin tube 8. Since the contact area between the thin tube 8 and the outside is small, and the amount of liquid 13 in the thin tube 8 is also small, the evaporation rate of liquid 13 in the thin tube 8 is slow, thus greatly reducing the consumption rate of liquid 13 in container 2. Because this wet-bulb temperature detection device reduces the evaporation rate of liquid 13, the detection cycle is extended, eliminating the need for frequent water addition. This significantly reduces the frequency of adding liquid 13 to container 2, thereby reducing the workload of personnel. The reduced frequency of adding liquid 13 also lowers the probability of forgetting to add liquid 13, thus improving the error tolerance and ensuring accurate wet-bulb temperature detection.

[0037] Optionally, in one embodiment of this disclosure, the gauze 4 is constructed as a strip structure, and the gauze 4 located inside the capillary tube 8 is closely attached to the inner wall of the capillary tube 8 and extends along the length direction of the capillary tube 8.

[0038] In this embodiment, the gauze 4 is configured as a strip structure, which facilitates the extension of the gauze 4 along the length of the capillary tube 8, allowing the gauze 4 to completely cover the capillary tube 8, thereby ensuring the wetting effect on the gauze 4. The gauze 4 is tightly attached to the inner wall of the capillary tube 8, ensuring that the liquid 13 in the capillary tube 8 is primarily used to wet the gauze 4, preventing the liquid 13 in the capillary tube 8 from evaporating too quickly due to gaps between the gauze 4 and the capillary tube 8.

[0039] Optionally, in one embodiment of this disclosure, the capillary tube 8 is constructed as an "L" shape, the cross-section of the capillary tube 8 is circular, and the inner diameter of the capillary tube 8 is 5mm-10mm.

[0040] In this embodiment, by setting the shape of the capillary tube 8 to an "L" shape, it is convenient for the end of the capillary tube 8 away from the container 2 to face directly upwards, facilitating the connection between the gauze 4 and the detection end of the thermometer 3. It is understood that by setting the capillary tube 8 to an "L" shape, the liquid level in the capillary tube 8 can be kept consistent with the liquid level in the container 2.

[0041] Setting the inner diameter of the thin tube 8 to 5mm-10mm ensures that the gauze 4 is wetted while reducing the evaporation rate of the liquid 13.

[0042] Optionally, in one embodiment of this disclosure, the container 2 includes a box body 201 and a top cover 202. The top of the box body 201 is an open structure. The top cover 202 can cover the top of the box body 201 and close the top of the box body 201. A sealing plug 9 is provided on the side of the top cover 202 facing the top of the box body 201. The sealing plug 9 is used to seal the joint between the top cover 202 and the top of the box body 201. A handle 10 is formed on the top cover 202.

[0043] In this embodiment, the housing 201 is used to store liquid 13. The top cover 202 is directly placed on the top of the housing 201, thereby sealing the top of the housing 201 and forming a sealed structure. This prevents the liquid 13 inside the housing 201 from contacting the outside environment, thus preventing the liquid 13 inside the housing 201 from evaporating directly. When it is necessary to add liquid 13 to the housing 201, the top cover 202 can be removed, and liquid 13 can be added directly to the housing 201, which is very convenient.

[0044] In this embodiment, the sealing plug 9 provided on the top cover 202, when the top cover 202 is placed on top of the box body 201, is located inside the box body 201. At this time, the side wall of the sealing plug 9 contacts the inner side wall of the box body 201, thereby sealing the joint between the top cover 202 and the top of the box body 201 and preventing the liquid 13 inside the box body 201 from evaporating from the joint. In addition, the sealing plug 9 provided on the top cover 202 can also limit the position of the top cover 202, keeping it at the top of the box body 201.

[0045] In this embodiment, the handle 10 provided on the top cover 202 can be easily removed from the box body 201 to facilitate the addition of liquid 13.

[0046] Optionally, in one embodiment of this disclosure, the upper cover 202 is provided with an air pressure balance hole 7 that penetrates the upper cover 202, and the sealing plug 9 is provided with a connecting hole 6 that penetrates the sealing plug 9. The connecting hole 6 communicates with the air pressure balance hole 7. The air pressure balance hole 7 is configured to guide outside air into the box 201 so that the air pressure inside the box 201 is in a balanced state with the outside air pressure.

[0047] In this embodiment, the pressure balance hole 7 and the connecting hole 6 are arranged opposite to each other so that the pressure balance hole 7 and the connecting hole 6 can communicate with each other, allowing outside air to enter the box 201 through the pressure balance hole 7 and the connecting hole 6, thereby making the air pressure inside the box 201 equal to the outside air pressure, avoiding negative pressure inside the box 201, so that when the liquid 13 in the thin tube 8 evaporates, the liquid 13 in the box 201 can enter the thin tube 8.

[0048] It should be noted that the pressure balance hole 7 and the connecting hole 6 are only for air passage and will not cause the liquid 13 inside the box 201 to evaporate faster.

[0049] Optionally, in one embodiment of this disclosure, the diameters of both the pressure balance hole 7 and the connecting hole 6 are 1-3 mm.

[0050] In this embodiment, by setting the diameters of the pressure balancing hole 7 and the connecting hole 6 to 1-3 mm, the evaporation of the liquid 13 inside the housing 201 through the pressure balancing hole 7 and the connecting hole 6 is negligible due to their small size. In some examples, the diameters of both the pressure balancing hole 7 and the connecting hole 6 are 2 mm, which ensures the pressure balancing effect.

[0051] Optionally, in one embodiment of this disclosure, the wet-bulb temperature detection device further includes a Stevenson screen 1 and a fixed support 5. The fixed support 5, the container 2, and the thermometer 3 are all disposed inside the Stevenson screen 1. The thermometer 3 is connected to the fixed support 5 so that the thermometer 3 is located above the end of the thin tube 8 away from the container 2.

[0052] In this embodiment, the fixed bracket 5 is used to install and fix the thermometer 3. The fixed bracket 5, container 2, and thermometer 3 are all located inside the Stevenson screen 1. The Stevenson screen 1 can shield the fixed bracket 5, container 2, and thermometer 3, preventing them from getting wet from rain. The Stevenson screen 1 is equipped with a ventilation grille 11, which allows outside air to enter the Stevenson screen 1 through the ventilation grille 11, thereby allowing the liquid 13 on the gauze 4 to evaporate, thus realizing the measurement of wet-bulb temperature.

[0053] In some examples, the mounting bracket 5 and container 2 can be bolted to the inner bottom wall of the Stevenson screen 1, facilitating installation and allowing for disassembly and replacement. Thermometer 3 can also be bolted to the mounting bracket 5, allowing for easy replacement. Alternatively, in other examples, the mounting bracket 5 and container 2 can be placed directly on the inner bottom wall of the Stevenson screen 1. Thermometer 3 can be glued to the mounting bracket 5.

[0054] Optionally, in one embodiment of this disclosure, the fixed bracket 5 includes a base, a vertical rod, and a horizontal rod. The bottom end of the vertical rod is connected to the base, the horizontal rod is connected to the top end of the vertical rod, and the thermometer 3 is connected to the horizontal rod.

[0055] Alternatively, in one embodiment of this disclosure, the Stevenson screen 1 may be made of wood. The container 2 may be made of stainless steel. The thin tube 8 may be made of PVC or glass.

[0056] Optionally, in one embodiment of this disclosure, the wet-bulb temperature detection device further includes a data acquisition unit, the thermometer 3 is an electronic thermometer 3, the data acquisition unit is electrically connected to the electronic thermometer 3, the data acquisition unit is used to collect temperature data from the electronic thermometer 3, and the data acquisition unit is used to be electrically connected to a terminal.

[0057] In this embodiment, the temperature data measured by the electronic thermometer 3 can be directly converted into an electrical signal and transmitted to a data acquisition unit. The data acquisition unit can collect the temperature data measured by the electronic thermometer 3 and feed it back to the terminal, where it can be displayed and analyzed. Operators can directly view the data through the terminal. Optionally, in some examples, the terminal can be a computer or a DCS system.

[0058] Optionally, in one embodiment of this disclosure, the wet-bulb temperature detection device further includes a level gauge 12, a controller, and an alarm. The level gauge 12 is connected to the bottom of the container 2 and is used to detect the level of the liquid 13 in the container 2. The level gauge 12 and the alarm are both electrically connected to the controller, and the controller can control the alarm to issue an alarm prompt based on the level data detected by the level gauge 12.

[0059] In this embodiment, the level gauge 12 can detect the level of the liquid 13 in the container 2. The level gauge 12 is located at the bottom of the container 2. The level gauge 12 sends the detection data to the controller, and then the controller can control the alarm to issue an alarm prompt.

[0060] Understandably, as the liquid 13 in the capillary tube 8 gradually evaporates, the container 2 replenishes the capillary tube 8 with liquid 13. At this time, the liquid level of liquid 13 in the container 2 continuously decreases. The level gauge 12 sends the detection data to the controller in real time. The controller compares the detection data with the preset liquid level value. When the liquid level of liquid 13 in the container 2 is equal to or lower than the preset liquid level value, it means that the container 2 needs to be replenished with liquid 13. The controller controls the alarm to issue an alarm prompt to remind personnel to add liquid 13, thereby avoiding the situation of missing liquid 13.

[0061] Optionally, in one embodiment of this disclosure, the liquid 13 in container 2 includes water or windshield washer fluid. By setting the liquid 13 to water or windshield washer fluid, the choice can be made according to different usage environments. When the ambient temperature is above 0°C, water can be used, and when the ambient temperature is equal to or below 0°C, windshield washer fluid can be used, which can avoid the problem of the liquid 13 freezing and becoming undetectable.

[0062] A second aspect of this disclosure also provides a cooling tower proximity monitoring system, including a cooling tower, a dry-bulb temperature detection device, and the aforementioned wet-bulb temperature detection device. The wet-bulb temperature detection device is disposed at the air inlet of the cooling tower to detect the air inlet temperature of the cooling tower, and the dry-bulb temperature detection device is disposed at the water outlet of the cooling tower to detect the water outlet temperature of the cooling tower.

[0063] In this embodiment, there are two wet-bulb temperature detection devices, which are respectively arranged on two mutually perpendicular radii of the cooling tower, and the dry-bulb temperature detection device is set at a position 1m away from the edge of the water collection pool and at a height of 1.5m.

[0064] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0066] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A wet-bulb temperature detection device, characterized in that, Includes containers, gauze, and thermometers; The container is used to store liquid. A thin tube is provided at the bottom of the outer wall of the container. The thin tube is connected to the container so that the liquid in the container can flow into the thin tube. The end of the thin tube away from the container faces upward. The gauze is placed inside the thin tube, and part of the gauze extends out through the end of the thin tube away from the container and wraps the detection end of the thermometer so that the thermometer can detect the wet bulb temperature. The gauze is constructed in a strip-like structure, and the gauze inside the thin tube is closely attached to the inner wall of the thin tube and extends along the length of the thin tube. The container includes a box body and a top cover. The top of the box body is an open structure. The top cover can be placed on the top of the box body and close the top of the box body. A sealing plug is provided on the side of the top cover facing the top of the box body. The sealing plug is used to seal the joint between the top cover and the top of the box body. The upper cover has a pressure balance hole that penetrates through the upper cover, and the sealing plug has a connecting hole that penetrates through the sealing plug. The connecting hole is connected to the pressure balance hole. The pressure balance hole is configured to guide outside air into the box so that the air pressure inside the box is in a balanced state with the outside air pressure.

2. The wet-bulb temperature detection device according to claim 1, characterized in that, The thin tube has an "L" shaped structure, a circular cross-section, and an inner diameter of 5mm-10mm.

3. The wet-bulb temperature detection device according to claim 1, characterized in that, A handle is formed on the top cover.

4. The wet-bulb temperature detection device according to claim 1, characterized in that, The diameters of both the pressure balancing hole and the connecting hole are 1-3 mm.

5. The wet-bulb temperature detection device according to claim 1, characterized in that, The wet-bulb temperature detection device also includes a Stevenson screen and a fixed support. The fixed support, the container, and the thermometer are all disposed inside the Stevenson screen. The thermometer is connected to the fixed support so that the thermometer is located above the end of the thin tube away from the container.

6. The wet-bulb temperature detection device according to claim 1, characterized in that, The wet-bulb temperature detection device also includes a data acquisition unit. The thermometer is an electronic thermometer. The data acquisition unit is electrically connected to the electronic thermometer. The data acquisition unit is used to collect the temperature data of the electronic thermometer and is electrically connected to a terminal.

7. The wet-bulb temperature detection device according to any one of claims 1-6, characterized in that, The liquid in the container includes water or glass cleaner.

8. A cooling tower proximity monitoring system, characterized in that, The device includes a cooling tower, a dry-bulb temperature detection device, and a wet-bulb temperature detection device as described in any one of claims 1-7. The wet-bulb temperature detection device is located at the air inlet of the cooling tower to detect the air inlet temperature of the cooling tower, and the dry-bulb temperature detection device is located at the water outlet of the cooling tower to detect the water outlet temperature of the cooling tower.

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