A cooling tower water vapor condensation device

Abstract

This application provides a water vapor condensation device for a cooling tower, including a condensation tank installed on a first opening of the cooling tower, forming a sealed chamber with the cooling tower; a negative pressure fan is installed inside the cooling tower corresponding to its first opening; a heat exchange component with a cavity is installed in the condensation tank, the heat exchange component including a first inlet on the side closer to the cooling tower and a first outlet on the side farther from the cooling tower, the first inlet and the first outlet being connected to the cavity respectively; a liquid nitrogen storage tank and a nitrogen recovery storage tank are respectively installed outside the condensation tank corresponding to the heat exchange component, the liquid nitrogen storage tank including a second outlet, and the nitrogen recovery storage tank including a third inlet and a third outlet; the second outlet is connected to the first inlet, and the third inlet is connected to the first outlet. The beneficial effect of this application is that the liquid nitrogen in the liquid nitrogen storage tank enters the heat exchange component, and according to the heat absorption characteristic of liquid nitrogen during vaporization, the water vapor in the cooling tower is cooled into condensate and recycled, achieving the purpose of environmental protection and water conservation.

Description

Technical Field

[0001] The present invention relates to the field of circulating water systems for glass manufacturing, and in particular to a water vapor condensing device for a cooling water tower. Background Art

[0002] There are two important links in auxiliary production in glass manufacturing enterprises. The first is the circulating water system, which mainly uses circulating water to cool the glass liquid in the production line. The recovered hot water is then evaporated and cooled in the cooling tower and then circulated again. A certain amount of tap water is consumed every day, which is inefficient and wastes resources. The second is the nitrogen production system, which operates normally every day to supply nitrogen protective gas to the production line. At the same time, a certain amount of liquid nitrogen is produced and stored normally every day. It is only used for emergency use when the protective gas is tight or abnormal. Therefore, liquid nitrogen will also cause waste of resources when it is not enabled. The method of this patent is to use the heat absorption characteristics of excess liquid nitrogen when it is gasified to cool the evaporated water vapor in the circulating water cooling tower into condensed water and recycle it for recycling, so as to achieve the purpose of reducing the loss of tap water, which is in line with the current national situation, environmentally friendly and saves water resources. Summary of the invention

[0003] The purpose of this application is to provide a cooling tower water vapor condensation device to address the above problems.

[0004] In a first aspect, the present application provides a cooling water tower water vapor condensation device, comprising a condensation tank arranged on a first opening of the cooling water tower, the condensation tank and the cooling water tower forming a closed chamber; a negative pressure fan is arranged in the cooling water tower corresponding to the first opening thereof; a heat exchange component with a cavity is arranged in the condensation tank, the heat exchange component comprises a first inlet close to a side of the cooling water tower and a first outlet away from a side of the cooling water tower, the first inlet and the first outlet are respectively communicated with the cavity; a liquid nitrogen storage tank and a nitrogen recovery storage tank are respectively arranged outside the condensation tank corresponding to the heat exchange component, the liquid nitrogen storage tank comprises a second outlet, and the nitrogen recovery storage tank comprises a third inlet and a third outlet; the second outlet is communicated with the first inlet, and the third inlet is communicated with the first outlet. The negative pressure fan draws the water vapor in the cooling water tower to the space above the cooling water tower corresponding to the condenser tank. At the same time, the liquid nitrogen in the liquid nitrogen storage tank enters the cavity of the heat exchange component. Since the temperature of the water vapor in the condenser tank is higher than the temperature of the liquid nitrogen in the heat exchange component, the water vapor and the liquid nitrogen exchange heat. The water vapor liquefies when it is cold, and the liquid nitrogen vaporizes when it is hot. Therefore, the water vapor liquefies into condensed water and flows back into the cooling water tower along the side walls of the condenser tank and the cooling water tower, thus completing the recovery of the water vapor in the cooling water tower. The liquid nitrogen vaporizes into nitrogen and enters the nitrogen recovery tank, thus completing the recovery of nitrogen and further supplying it to the production line for use.

[0005] According to the technical solution provided in the embodiment of the present application, the heat exchange assembly includes a plurality of interconnected heat exchange tubes, each of which is provided with the cavity, each of which is arranged in an S-shaped horizontal direction, and each of which is arranged in sequence along the vertical direction from the side close to the cooling water tower to the direction away from the cooling water tower. Each heat exchange tube is arranged in an S-shaped horizontal direction in order to increase the contact area of ​​the heat exchange between the liquid nitrogen in the heat exchange tube and the water vapor outside the heat exchange tube. The purpose of providing a plurality of vertically arranged heat exchange tubes is to further increase the contact area of ​​the heat exchange between the liquid nitrogen in the heat exchange tube and the water vapor outside the heat exchange tube.

[0006] According to the technical solution provided in the embodiment of the present application, a connecting plate is provided in the gap between the pipes arranged in an S shape of each heat exchange tube, and a plurality of airflow holes extending along the airflow direction are provided on the connecting plate. Providing a connecting plate on the heat exchange tube and providing airflow holes on the connecting plate can allow the water vapor passing through the airflow holes to perform heat exchange again, thereby improving the efficiency of heat exchange between the liquid nitrogen in the heat exchange tube and the water vapor outside the heat exchange tube.

[0007] According to the technical solution provided in the embodiment of the present application, a pair of fins are respectively arranged on the connecting plate corresponding to each of the airflow holes, and the fins are inclined from the edge of the airflow hole to the direction close to the center line of the airflow hole, and the pair of fins are symmetrically arranged on both sides of the edge of the airflow hole along the center line as the symmetry axis and are arranged at a first acute angle with the surface of the connecting plate. A connecting plate is arranged on the heat exchange tube, and a pair of fins are arranged on the connecting plate so that the water vapor passing through the pair of fins can be heat exchanged again, thereby improving the efficiency of heat exchange between the liquid nitrogen in the heat exchange tube and the water vapor outside the heat exchange tube.

[0008] According to the technical solution provided in the embodiment of the present application, the top surface of the condensing tank is provided with a second opening, and a skylight with adjustable ventilation volume is provided on the top of the condensing tank corresponding to the second opening. The skylight is closed in a normal state and opens when a negative pressure fan fails or a heat exchange component fails.

[0009] According to the technical solution provided in the embodiment of the present application, a plurality of temperature sensors are arranged in the condensation tank.

[0010] According to the technical solution provided in the embodiment of the present application, the relative cavity wall distance of the cavity of the heat exchange tube is in the range of 1.5 cm to 2.5 cm.

[0011] According to the technical solution provided in the embodiment of the present application, the spacing between adjacent heat exchange tubes ranges from 2cm to 3cm.

[0012] According to the technical solution provided in the embodiment of the present application, the diameter of the air flow hole is 2 cm.

[0013] According to the technical solution provided in the embodiment of the present application, an electrically controlled liquid outlet valve is connected between the second outlet and the first inlet, and the electrically controlled liquid outlet valve is configured to adjust the amount of liquid nitrogen entering the cooling water tower according to the signal of the temperature sensor.

[0014] Beneficial effects of the present invention: The present application provides a cooling water tower water vapor condensation device, comprising a condensation tank arranged on a first opening of the cooling water tower, the condensation tank and the cooling water tower forming a closed chamber; a negative pressure fan is arranged in the cooling water tower corresponding to the first opening thereof; a heat exchange component with a cavity is arranged in the condensation tank, the heat exchange component comprises a first inlet close to a side of the cooling water tower and a first outlet away from a side of the cooling water tower, the first inlet and the first outlet are respectively communicated with the cavity; a liquid nitrogen storage tank and a nitrogen recovery storage tank are respectively arranged outside the condensation tank corresponding to the heat exchange component, the liquid nitrogen storage tank comprises a second outlet, and the nitrogen recovery storage tank comprises a third inlet and a third outlet; the second outlet is communicated with the first inlet, and the third inlet is communicated with the first outlet.

[0015] The liquid nitrogen in the liquid nitrogen storage tank enters the heat exchange component. According to the heat absorption characteristic of liquid nitrogen when it is gasified, the water vapor in the cooling water tower is cooled into condensed water and recycled for recycling, achieving the purpose of environmental protection and saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the first embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the top view of the heat exchange tube and the connecting plate in the first embodiment of the present application;

[0018] Figure 3 This is a side structural schematic diagram of a heat exchange tube and a connecting plate of the first embodiment of the present application;

[0019] The text labels in the figure are as follows: 100, cooling water tower; 200, condensation tank; 210, skylight; 220, temperature sensor; 300, negative pressure fan; 400, heat exchange component; 410, first inlet; 420, first outlet; 430, heat exchange tube; 440, connecting plate; 450, air flow hole; 460, fin; 500, liquid nitrogen storage tank; 510, second outlet; 520, electronically controlled liquid outlet valve; 600, nitrogen recovery tank; 610, third inlet; 620, third outlet. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0021] like Figure 1 The schematic diagram of the first embodiment of the present application is shown, which includes a condensing tank 200 disposed on the first opening of the cooling water tower 100, and the condensing tank 200 and the cooling water tower 100 form a closed chamber. In this embodiment, the hot water in the cooling water tower 100 evaporates to form water vapor. If it is not recovered, a large amount of water vapor will be emitted into the air, thereby causing a waste of water resources in the cooling water tower 100. Therefore, a condensing tank 200 is disposed on the cooling water tower 100, so that the condensing tank 200 and the cooling water tower 100 form a closed chamber.

[0022] A negative pressure fan 300 is arranged in the cooling water tower 100 corresponding to the first opening thereof; a heat exchange component 400 with a cavity is arranged in the condensing tank 200, and the heat exchange component 400 includes a first inlet 410 close to a side of the cooling water tower 100 and a first outlet 420 away from a side of the cooling water tower 100, and the first inlet 410 and the first outlet 420 are respectively communicated with the cavity; a liquid nitrogen storage tank 500 and a nitrogen recovery tank 600 are respectively arranged outside the condensing tank 200 corresponding to the heat exchange component 400, the liquid nitrogen storage tank 500 includes a second outlet 510, and the nitrogen recovery tank 600 includes a third inlet 610 and a third outlet 620; the second outlet 510 is communicated with the first inlet 410, and the third inlet 610 is communicated with the first outlet 420.

[0023] In this embodiment, the negative pressure fan 300 pumps the water vapor in the cooling water tower 100 to the space above the cooling water tower 100 corresponding to the condensing tank 200. At the same time, the liquid nitrogen in the liquid nitrogen storage tank 500 enters the cavity of the heat exchange component 400 after passing through the second outlet 510 and the first inlet 410 in sequence. Since the temperature of the water vapor in the condensing tank 200 is higher than the temperature of the liquid nitrogen in the heat exchange component 400, the water vapor and the liquid nitrogen exchange heat, and the water vapor is liquefied when it is cooled, and the liquid nitrogen is gasified when it is heated. Therefore, the water vapor is liquefied into condensed water and flows back into the cooling water tower 100 along the side walls of the condensing tank 200 and the cooling water tower 100, thereby completing the recovery of the water vapor in the cooling water tower 100. The liquid nitrogen is gasified into nitrogen, and enters the nitrogen recovery tank 600 after passing through the first outlet 420 and the third inlet 610 in sequence, thereby completing the recovery of nitrogen. The nitrogen recovered to the nitrogen recovery tank 600 is discharged through the third outlet 620 and supplied to the production line for use. Preferably, a regulating valve is provided between the third outlet 620 and the production line to adjust the amount of nitrogen supplied to the production line.

[0024] In this embodiment, the wind speed of the negative pressure fan 300 is adjustable to adjust the amount of water vapor pumped into the condensation tank 200. In this embodiment, the temperature range of the bottom of the condensation tank 200 is controlled by the controller to be 0°C-5°C, and the temperature range of the top of the condensation tank 200 is 10°C-15°C.

[0025] In this embodiment, Figure 2 As shown, the heat exchange assembly 400 includes a plurality of interconnected heat exchange tubes 430, each of which is provided with the cavity, and each of which is arranged in an S-shaped horizontal direction, and each of which is arranged in sequence along the vertical direction from a side close to the cooling water tower 100 to a direction away from the cooling water tower 100. In this embodiment, each heat exchange tube 430 is arranged in an S-shaped horizontal direction in order to increase the contact area of ​​heat exchange between the liquid nitrogen in the heat exchange tube 430 and the water vapor outside the heat exchange tube 430. The purpose of providing a plurality of vertically arranged heat exchange tubes 430 is to further increase the contact area of ​​heat exchange between the liquid nitrogen in the heat exchange tube 430 and the water vapor outside the heat exchange tube 430.

[0026] Taking the example of ten heat exchange tubes 430 in the condensing tank 200, the distance from the cooling water tower 100 is sequentially numbered as the first pipe, the second pipe, and the tenth pipe, and the first outlet 420 is one end of the first pipe, and the first outlet 420 is one end of the tenth pipe. After the liquid nitrogen enters the first pipe from the first inlet 410, it flows in the cavity of the first pipe, and enters the second pipe connected to the first pipe when it flows to the end of the first pipe far from the first inlet 410. By analogy, the liquid nitrogen gradually completes the gasification process in the process of flowing in the first pipe to the tenth pipe, and finally the nitrogen is discharged from the first outlet 420.

[0027] In this embodiment, the cross section of the cavity of the heat exchange tube 430 is circular, and the aperture range of the cavity is 1.5 cm-2.5 cm, preferably 2 cm.

[0028] In this embodiment, the distance between adjacent heat exchange tubes 430 is in the range of 2 cm-3 cm, preferably 2 cm.

[0029] In this embodiment, the heat exchange tube 430 is made of metal, preferably copper or aluminum. The thickness of the heat exchange tube 430 is preferably 3 cm.

[0030] Preferably, a plurality of temperature sensors 220 are provided in the condensing tank 200 , and an electrically controlled liquid outlet valve 520 is connected between the second outlet 510 and the first inlet 410 , and the electrically controlled liquid outlet valve 520 is configured to adjust the amount of liquid nitrogen entering the cooling water tower 100 according to the signal of the temperature sensor 220 .

[0031] In a preferred embodiment, if Figure 2 and Figure 3As shown, each of the heat exchange tubes 430 is provided with a connecting plate 440 in the S-shaped arrangement of the pipe gap, and the connecting plate 440 is provided with a plurality of airflow holes 450 extending along the airflow flow direction. In this preferred embodiment, the airflow hole 450 is arranged in the direction of the airflow formed by the negative pressure fan 300, that is, the airflow hole 450 is opened from the side close to the cooling water tower 100 to the side away from the cooling water tower 100, and water vapor passes through the airflow hole 450. Since the airflow hole 450 is arranged on the connecting plate 440 connected to the heat exchange tube 430, according to the heat conduction effect, the temperature of the airflow hole 450 should be consistent with the temperature of the liquid nitrogen in the heat exchange tube 430, which is lower than the temperature of the water vapor. Therefore, the water vapor exchanges heat while passing through the airflow hole 450, thereby improving the efficiency of heat exchange between the liquid nitrogen in the heat exchange tube 430 and the water vapor outside the heat exchange tube 430. In this preferred embodiment, the diameter of the airflow hole 450 is preferably 2 cm. Preferably, in order to allow the water vapor passing through the upper and lower adjacent connecting plates 440 to more fully contact the air flow holes 450 , the air flow holes 450 on the upper and lower adjacent connecting plates 440 are arranged in a staggered manner.

[0032] Preferably, in the above preferred embodiment, a pair of fins 460 are respectively arranged on the connecting plate 440 corresponding to each of the air flow holes 450, and the fins 460 are inclined from the edge of the air flow hole 450 to the direction close to the center line of the air flow hole 450, and the pair of fins 460 are symmetrically arranged on both sides of the edge of the air flow hole 450 along the center line as the symmetry axis and are arranged at a first acute angle with the surface of the connecting plate 440, such as Figure 3 As shown, ∠a marked in the figure is the first acute angle. In the preferred embodiment, the angle of the first acute angle is 45°. In other embodiments, the angle of the first acute angle can also be 30°, 60° or any value in the range of 30° to 60°. In the preferred embodiment, a pair of fins 460 are arranged on both sides of the air flow hole 450 opposite to each other, which can block the water vapor passing through the air flow hole 450 to a certain extent, so that the water vapor passes through the surface of the fin 460. Therefore, the water vapor passing through the air flow hole 450 is cooled by heat exchange with the fin 460 again, which increases the contact area of ​​the water vapor heat exchange and also improves the heat exchange efficiency. In the preferred embodiment, the extension length range of the fin 460 is 3-5cm.

[0033] In a preferred embodiment, a second opening is provided on the top surface of the condensing tank 200, and a skylight 210 for adjusting the ventilation volume is provided on the top of the condensing tank 200 corresponding to the second opening. In this preferred embodiment, the skylight 210 is an electrically controlled structure, and the size of the second opening is adjusted by moving the skylight 210. The skylight 210 is closed when the system is operating normally, and when a problem occurs with the heat exchange component 400 or the negative pressure fan 300, the skylight 210 is opened or partially opened.

[0034] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the methods and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concepts and technical solutions of the application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A cooling tower water vapor condensation device, characterized in that: It comprises a condensation tank (200) arranged on a first opening of a cooling water tower (100), wherein the condensation tank (200) and the cooling water tower (100) form a closed chamber; a negative pressure fan (300) is arranged in the cooling water tower (100) corresponding to the first opening thereof; A heat exchange component (400) with a cavity is arranged in the condensing tank (200), the heat exchange component (400) comprising a first inlet (410) on a side close to the cooling water tower (100) and a first outlet (420) on a side away from the cooling water tower (100), the first inlet (410) and the first outlet (420) being respectively connected to the cavity; A liquid nitrogen storage tank (500) and a nitrogen recovery storage tank (600) are respectively arranged outside the condensing tank (200) and corresponding to the heat exchange assembly (400); the liquid nitrogen storage tank (500) comprises a second outlet (510), and the nitrogen recovery storage tank (600) comprises a third inlet (610) and a third outlet (620); the second outlet (510) is in communication with the first inlet (410), and the third inlet (610) is in communication with the first outlet (420); The liquid nitrogen in the liquid nitrogen storage tank enters the heat exchange component (400), and according to the heat absorption characteristic of the liquid nitrogen when it is vaporized, the water vapor in the cooling water tower (100) is cooled into condensed water and recycled for reuse; The heat exchange assembly (400) comprises a plurality of interconnected heat exchange tubes (430), each heat exchange tube (430) being provided with the cavity, each heat exchange tube (430) being arranged in an S-shape in the horizontal direction, and each heat exchange tube (430) being arranged in sequence along the vertical direction from a side close to the cooling water tower (100) to a direction away from the cooling water tower (100); A connecting plate (440) is provided in the pipe gap of each heat exchange tube (430) arranged in an S shape, and a plurality of air flow holes (450) extending along the air flow direction are provided on the connecting plate (440); A pair of fins (460) is respectively arranged on the connection plate (440) corresponding to each of the air flow holes (450), the fins (460) being inclined from the edge of the air flow hole (450) towards the direction close to the center line of the air flow hole (450), and the pair of fins (460) are symmetrically arranged on both sides of the edge of the air flow hole (450) along the center line as the symmetry axis and are both arranged at a first acute angle with the surface of the connection plate (440); The relative cavity wall distance of the cavity of the heat exchange tube (430) ranges from 1.5 cm to 2.5 cm.

2. The cooling tower water vapor condensing device according to claim 1, characterized in that: The top surface of the condensation tank (200) is provided with a second opening, and a skylight (210) capable of adjusting ventilation volume is provided at the top of the condensation tank (200) corresponding to the second opening.

3. The cooling tower water vapor condensing device according to claim 1, characterized in that: A plurality of temperature sensors (220) are arranged in the condensation tank (200).

4. The cooling tower water vapor condensing device according to claim 1, characterized in that: The distance between adjacent heat exchange tubes (430) ranges from 2 cm to 3 cm.

5. The cooling tower water vapor condensing device according to claim 1, characterized in that: The diameter of the air flow hole (450) is 2 cm.

6. The cooling tower water vapor condensing device according to claim 3, characterized in that: An electrically controlled liquid outlet valve (520) is connected between the second outlet (510) and the first inlet (410), and the electrically controlled liquid outlet valve (520) is configured to adjust the amount of liquid nitrogen entering the cooling water tower (100) according to a signal from the temperature sensor (220).

Images