Condensed water storage device for direct air cooling system

Abstract

The utility model discloses condensed water storage equipment for a direct air cooling system, and relates to the technical field of thermal power generation equipment. According to the technical key points, the device comprises a storage tank, and an independent water inlet chamber is mounted in the storage tank; a condensed water inlet pipe is arranged on the storage tank, one end of the condensed water inlet pipe is located on the outer side of the storage tank, and the other end of the condensed water inlet pipe communicates with the water inlet chamber; a plurality of spring nozzles are uniformly arranged at the bottom of the water inlet chamber; a steam inlet pipe is arranged on the side, close to the water inlet chamber, of the condensed water inlet pipe on the storage tank, and the steam inlet pipe and the storage tank are fixedly connected and communicate with each other. According to the storage equipment, after condensed water enters the water inlet chamber, the condensed water is converted into vaporific water drops through the spring nozzles, the vaporific water drops are sprayed out and then make full contact with dead steam in the storage tank, so that oxygen in the condensed water is removed, and the condensed water is prevented from corroding related equipment and pipelines of a power plant during use.

Description

Technical Field

[0001] The present application relates to the technical field of thermal power generation equipment, and in particular to a condensate storage device for a direct air cooling system. Background Art

[0002] The appearance of the cooling tower in the direct air cooling system is like a large chimney. It mainly cools the exhaust steam discharged from the turbine through the flow of natural air. The cooled condensed water will be collected and processed by the condensed water recovery system and reused later. Therefore, the cooling tower condensed water recovery system is one of the necessary devices of many factory cooling towers, and the condensed water storage device is the most important device in the condensed water recovery system. Condensed water often dissolves some oxygen during the production process, especially in winter. When the supercooling degree of condensed water increases, the oxygen content inside it will increase. If these condensed water containing oxygen is directly used in the relevant equipment of the power plant, it will accelerate the corrosion rate of the relevant pipelines and equipment. Therefore, the present application proposes a condensed water storage device for a direct air cooling system to solve this problem. Utility Model Content

[0003] The present application provides a condensate storage device for a direct air cooling system, which can deoxygenate the condensate before re-transmitting it to other related equipment in a power plant, thereby preventing the oxygen in the water from corroding the related equipment or pipelines.

[0004] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0005] A condensate storage device for a direct air cooling system, comprising a horizontally placed storage tank, the storage tank being fixed to the ground via a plurality of supports at the bottom, an independent water inlet chamber being installed in the storage tank, the water inlet chamber being close to the upper side of the storage tank; a condensate inlet pipe being arranged on the upper side of one end of the storage tank, one end of the condensate inlet pipe being located on the outer side of the storage tank, the other end of the condensate inlet pipe extending into the storage tank and then extending horizontally toward the other end of the storage tank until it is connected with the water inlet chamber;

[0006] A plurality of spring nozzles are evenly arranged at the bottom of the water inlet chamber, the water inlet end of the spring nozzle is located inside the water inlet chamber, and the water outlet end of the spring nozzle is located outside the water inlet chamber;

[0007] A steam inlet pipe is provided on one side of the condensate inlet pipe on the storage tank close to the water inlet chamber. The steam inlet pipe is fixedly connected to the storage tank and the two are in conduction with each other.

[0008] Furthermore, the water inlet chamber includes a porous bottom plate, one end of the porous bottom plate away from the condensate inlet pipe is fixedly connected to a side partition plate, and the other opposite end of the porous bottom plate is fixedly connected to a side support plate; and the tops of the side partition plate and the side support plate are both attached to and welded to the inner side of the storage tank, and the multiple spring nozzles are respectively installed in the holes on the porous bottom plate.

[0009] Furthermore, the lower end of the side support plate is flush with the lower end of the porous bottom plate, and the lower end of the side partition plate is lower than the lower end of the porous bottom plate.

[0010] Furthermore, a vacuum balance pipe is provided above the storage tank, one end of the vacuum balance pipe is connected to the internal space of the water inlet chamber, and the other end of the vacuum balance pipe is connected to the internal space of the storage tank.

[0011] Furthermore, the storage tank is also provided with a gas exhaust pipe, which can be connected to a vacuum pump, so as to extract the undissolved water vapor and oxygen released after the condensed water is heated in the storage tank.

[0012] Furthermore, manholes are respectively provided at both ends of the storage tank.

[0013] Furthermore, the storage tank is also provided with an on-site pressure gauge, an on-site liquid level gauge, a liquid level transmitter and a thermometer.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] The present application sets up a separate water inlet chamber in a storage tank for collecting condensate, and a constant speed spring nozzle is arranged on the bottom plate of the water inlet chamber. The spring nozzle can atomize the condensate transported into the water inlet chamber by the condensate inlet pipe, and then exchange heat with the turbine exhaust steam introduced into the storage tank by the steam inlet pipe, so as to heat the condensate evenly, achieve the effect of heating and deoxygenating the condensate, thereby effectively avoiding corrosion to other related equipment or pipelines of the power plant when it is used again later due to the presence of oxygen in the condensate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is the main view of the overall structure of this application;

[0018] Figure 2 It is a structural schematic diagram after one end of the storage tank of the present application is partially cut open;

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the condensate inlet pipe and the inlet chamber;

[0020] Figure 4 It is a structural schematic diagram of the porous bottom plate in the water inlet chamber of the present application.

[0021] Figure numerals: 1. Storage tank; 2. Support; 3. Water inlet chamber; 31. Porous bottom plate; 32. Side partition plate; 33. Side support plate; 4. Condensate inlet pipe; 5. Spring nozzle; 6. Steam inlet pipe; 7. Vacuum balance pipe; 8. Gas discharge pipe; 9. Manhole; 10. Local pressure gauge; 11. Local liquid level gauge; 12. Liquid level transmitter; 13. Thermometer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0023] like Figure 1-Figure 4 As shown, a condensate storage device for a direct air cooling system disclosed in the present application comprises a horizontally placed storage tank 1, the storage tank 1 being fixed to the ground by a plurality of supports 2 at the bottom, an independent water inlet chamber 3 being installed in the storage tank 1, and the water inlet chamber 3 being close to the upper side thereof in the storage tank 1; a condensate inlet pipe 4 is provided on the upper side of one end of the storage tank 1, one end of the condensate inlet pipe 4 is located on the outer side of the storage tank 1, and the other end of the condensate inlet pipe 4 extends into the storage tank 1 and then extends horizontally toward the other end of the storage tank 1 until it is connected with the water inlet chamber 3;

[0024] A plurality of spring nozzles 5 are evenly arranged at the bottom of the water inlet chamber 3, the water inlet end of the spring nozzle 5 is located inside the water inlet chamber 3, and the water outlet end of the spring nozzle 5 is located outside the water inlet chamber 3;

[0025] A steam inlet pipe 6 is provided on the side of the condensate inlet pipe 4 on the storage tank 1 close to the water inlet chamber 3. The steam inlet pipe 6 is fixedly connected to the storage tank 1 and the two are in conduction.

[0026] In the above embodiments, the storage tank 1 of the present application is similar in shape to a pressure tank, and has a cavity inside, which can be used to temporarily store gas or liquid. The water inlet chamber 3 provided in the present application is an independent space in the storage tank 1, and the water inlet chamber 3 is connected to the condensate inlet pipe 4, which can transport the condensate generated in the direct air cooling system into the water inlet chamber 3, and the water inlet chamber 3 of the present application is equipped with a plurality of spring nozzles 5 at the bottom (the spring nozzle 5 is a prior art, and its working principle is based on the principle of the electromagnetic valve, and the opening and closing of the nozzle is controlled by the elastic force of the spring and the energization of the electromagnetic coil). When the amount of water in the water inlet chamber 3 meets the working conditions of the spring nozzle 5, the spring nozzle 5 will convert the condensate in the water inlet chamber 3 into mist water and spray it evenly to the space directly below the water inlet chamber 3 in the storage tank 1.

[0027] The storage tank 1 of the present application can transport a portion of the exhaust steam generated by the steam turbine through the steam inlet pipe 6. The exhaust steam temperature of the steam turbine is generally between 100°C and 200°C. These exhaust steam from the steam turbine can heat the inside of the storage tank 1 when entering the storage tank 1. When the water reaches the saturation temperature, the partial pressure of the steam on the water surface is close to the total pressure of its mixed gas, and the partial pressure of the non-condensable gas is close to zero, so that the gas dissolved in the water will be continuously discharged from the water surface until it reaches a state of equilibrium at this temperature and pressure (this phenomenon can be referred to Henry's law, where Henry's law is: when the liquid and the gas are in the same equilibrium state, under the condition of a certain temperature, the amount of gas dissolved in a unit volume of liquid is proportional to the partial pressure of the gas on the liquid surface. When the water temperature rises, the evaporation of water increases, the partial pressure of water vapor on the water surface increases, and the partial pressure of the gas decreases relatively, resulting in the continuous precipitation of gas in the water to reach a new dynamic equilibrium state.)

[0028] After the exhaust steam enters the storage tank 1, it will fill the space outside the water inlet chamber 3. After the condensed water is uniformly and efficiently converted into a large amount of water mist from multiple spring nozzles 5, these small particles of condensed water will fully contact the exhaust steam in the storage tank 1, so that the heat in the exhaust steam can quickly and efficiently heat these mist condensed water to the saturation temperature required for deoxygenation. According to the above principle, oxygen will quickly precipitate from the condensed water at this time, thereby achieving the effect of removing oxygen from the condensed water. The deoxygenated condensed water will fall to the bottom of the storage tank 1 under the action of gravity and gather together again, forming deoxygenated condensed water with a certain depth in the storage tank 1. Since the exhaust steam continuously heats the condensed water in the storage tank 1, the condensed water recovery in the storage tank 1 is always kept in a saturated state, so that oxygen will not easily dissolve in the condensed water again after being precipitated from the condensed water. Moreover, before the condensate in the storage tank 1 is recycled, part of the exhaust steam can be guided through the pipeline to below the condensate after the initial deoxygenation, and the condensate is deeply deoxygenated (the exhaust steam introduced below the water surface will heat the condensate after the initial deoxygenation evenly again, so that it is in a saturated state, and deep deoxygenation is achieved. The oxygen that is not fully analyzed out of the mist condensate sprayed by the spring nozzle 5 is deoxygenated again, so as to ensure the quality of the condensate. The present application utilizes the heat of part of the exhaust steam of the steam turbine to deoxygenate the condensate containing dissolved oxygen, thereby avoiding the acceleration of the corrosion rate of the relevant equipment and pipelines of the power plant when the condensate containing oxygen is directly used, and prolonging the service life of the relevant equipment and pipelines. In addition, the condensate often needs to be reheated when it is reused. After the condensate is heated in the storage tank 1, the energy consumption of the condensate in subsequent use can be reduced, which has a certain effect of saving energy.

[0029] In actual use, the entire power generation system may lose water during operation, so it is often necessary to replenish the lost water to the power generation system. However, oxygen is also dissolved in the water flow often used for replenishing water. In order to prevent the water from corroding the relevant equipment or pipelines of the power plant, this part of the water flow can also be sent to the water inlet chamber 3 together with the condensed water before use, and the exhaust steam of the steam turbine is used for heating and deoxygenation. The relevant principles are the same as above and will not be repeated here.

[0030] Furthermore, if Figure 2-Figure 4 As shown, the water inlet chamber 3 includes a porous bottom plate 31, one end of the porous bottom plate 31 away from the condensate inlet pipe 4 is fixedly connected to a side partition plate 32, and the other opposite end of the porous bottom plate 31 is fixedly connected to a side support plate 33; and the tops of the side partition plate 32 and the side support plate 33 are both attached to and welded to the inner side of the storage tank 1, and a plurality of spring nozzles 5 are respectively installed in the respective holes on the porous bottom plate 31.

[0031] In the above embodiment, the porous bottom plate 31 is located at an upper position in the storage tank 1, so that the mist condensed water sprayed by the multiple spring nozzles 5 has a longer path when falling downward, thereby increasing the contact time with the exhaust steam and improving the effect of preliminary deoxygenation. The porous bottom plate 31, the side partition plate 32, the side support plate 33 and the inner wall of the top of the storage tank 1 can enclose an independent space in the storage tank 1, which is the water inlet chamber 3. Since the side support plate 33 is connected to one end of the condensed water inlet pipe 4 in addition to forming the water inlet chamber 3, the side support plate 33 also provides a certain support force for the condensed water inlet pipe 4. The number of through holes on the porous bottom plate 31 of the present application is preferably 48, and the number of spring nozzles 5 is also 48 accordingly, so that the 48 spring nozzles 5 can be installed one by one in the through holes of the 48 porous bottom plates 31, so as to achieve the effect of quickly and evenly spraying the condensed water in the water inlet chamber 3.

[0032] Furthermore, if Figure 2 and Figure 3 As shown, the lower end of the side support plate 33 is flush with the lower end of the porous bottom plate 31 , and the lower end of the side partition plate 32 is lower than the lower end of the porous bottom plate 31 .

[0033] In the above embodiments, the length of the side partition plate 32 of the present application is greater than the porous bottom plate 31 and the side support plate 33, and its lower end is close to the bottom of the storage tank 1 but does not contact the bottom of the storage tank 1. In this way, when the condensate water flows in the storage tank 1, the side partition plate 32 adjusts the flow direction, speed and distribution of the condensate water, thereby making the water temperature distribution of the condensate water in the storage tank 1 more uniform and the operation more stable.

[0034] Furthermore, if Figure 1 and Figure 2 As shown, a vacuum balance pipe 7 is provided above the storage tank 1 , one end of the vacuum balance pipe 7 is connected to the inner space of the water inlet chamber 3 , and the other end of the vacuum balance pipe 7 is connected to the inner space of the storage tank 1 .

[0035] In the above embodiments, the vacuum balance tube 7 is arranged in the above manner, which can connect the space in the water inlet chamber 3 and the space in the storage tank 1, so that the pressures inside them tend to be consistent, thereby preventing the pressure in the water inlet chamber 3 from being inconsistent with the pressure in the storage tank 1 and affecting the water spraying effect of the spring nozzle 5.

[0036] Furthermore, if Figure 2 As shown, the storage tank 1 is also provided with a gas exhaust pipe 8, which can be connected to a vacuum pump to extract the undissolved water vapor and oxygen released after the condensed water is heated in the storage tank 1.

[0037] In the above embodiments, the undissolved water vapor in the storage tank 1 and the oxygen released after the condensed water is heated can be extracted from the storage tank 1 and discharged into the atmosphere by a vacuum pump, thereby ensuring that the pressure in the storage tank 1 is in a stable state and the pressure will not increase due to excessive gas content, thereby increasing the danger of the equipment.

[0038] Furthermore, if Figure 1 and Figure 2 As shown, manholes 9 are respectively provided at both ends of the storage tank 1 .

[0039] In the above embodiments, the manholes 9 provided at both ends of the storage tank 1 are provided to facilitate technicians to inspect and repair the interior of the storage tank 1 .

[0040] Furthermore, if Figure 1 As shown, the storage tank 1 is also provided with a local pressure gauge 10, a local liquid level gauge 11, a liquid level transmitter 12 and a thermometer 13.

[0041] In the above embodiments, the present application equips the storage tank 1 with measuring instruments such as an on-site pressure gauge 10, a thermometer 13, an on-site liquid level gauge 11, and a liquid level transmitter 12, which can facilitate technical personnel to grasp the operating status of the equipment more comprehensively and clearly.

[0042] The implementation principle of this embodiment is as follows: the condensed water generated at the air cooling tower of the direct air cooling system can be sent to the water inlet chamber 3 in the storage tank 1 through the condensed water inlet pipe 4. When the amount of condensed water in the water inlet chamber 3 reaches a certain amount, multiple spring nozzles 5 can be started at the same time to convert the condensed water in the water inlet chamber 3 into mist droplets and spray them downward evenly in the storage tank 1. At the same time, part of the exhaust steam of the steam turbine will be input into the storage tank 1 through the steam inlet pipe 6. After entering the storage tank 1, the exhaust steam will fully contact and exchange heat with the mist condensed water sprayed by the multiple spring nozzles 5, so that the oxygen in the mist condensed water will be precipitated. Since the mist condensate has a long journey before it gathers in the storage tank 1, the mist condensate will be fully heated by the exhaust steam in this process to remove the oxygen inside it. Even if the oxygen in some of the mist condensate is not fully removed, they will still be in contact with the exhaust steam for a long time after gathering in the storage tank 1 before being reused. In this way, the oxygen in the condensate can be further heated and precipitated, thereby ensuring that the condensate will not cause corrosion to the relevant equipment or pipelines of the power plant due to containing more oxygen when it is reused.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A condensate storage device for a direct air cooling system, comprising a horizontally placed storage tank (1), wherein the storage tank (1) is fixed on the ground via a plurality of supports (2) at the bottom, and characterized in that: An independent water inlet chamber (3) is installed in the storage tank (1), and the water inlet chamber (3) is located near the upper side of the storage tank (1); a condensate water inlet pipe (4) is provided on the upper side of one end of the storage tank (1), one end of the condensate water inlet pipe (4) is located on the outside of the storage tank (1), and the other end of the condensate water inlet pipe (4) extends into the storage tank (1) and then extends horizontally toward the other end of the storage tank (1) until it is connected with the water inlet chamber (3); A plurality of spring nozzles (5) are evenly arranged at the bottom of the water inlet chamber (3), the water inlet end of the spring nozzle (5) is located inside the water inlet chamber (3), and the water outlet end of the spring nozzle (5) is located outside the water inlet chamber (3); A steam inlet pipe (6) is provided on the side of the condensate inlet pipe (4) on the storage tank (1) close to the water inlet chamber (3); the steam inlet pipe (6) is fixedly connected to the storage tank (1) and the two are in conduction with each other.

2. The condensate storage device for a direct air cooling system according to claim 1, characterized in that: The water inlet chamber (3) comprises a porous bottom plate (31), one end of the porous bottom plate (31) away from the condensate inlet pipe (4) is fixedly connected to a side partition plate (32), and the other opposite end of the porous bottom plate (31) is fixedly connected to a side support plate (33); and the tops of the side partition plate (32) and the side support plate (33) are both attached to and welded to the inner side of the storage tank (1), and a plurality of spring nozzles (5) are respectively installed in the respective holes on the porous bottom plate (31).

3. The condensate storage device for a direct air cooling system according to claim 2, characterized in that: The lower end of the side support plate (33) is flush with the lower end of the porous bottom plate (31), and the lower end of the side partition plate (32) is lower than the lower end of the porous bottom plate (31).

4. The condensate storage device for a direct air cooling system according to any one of claims 1 to 3, characterized in that: A vacuum balance pipe (7) is provided above the storage tank (1); one end of the vacuum balance pipe (7) is connected to the internal space of the water inlet chamber (3); and the other end of the vacuum balance pipe (7) is connected to the internal space of the storage tank (1).

5. The condensate storage device for a direct air cooling system according to any one of claims 1 to 3, characterized in that: The storage tank (1) is also provided with a gas exhaust pipe (8), which can be connected to a vacuum pump, so as to extract the undissolved water vapor and oxygen released after the condensed water is heated in the storage tank (1).

6. The condensate storage device for a direct air cooling system according to claim 1, characterized in that: Manholes (9) are respectively provided at both ends of the storage tank (1).

7. The condensate storage device for a direct air cooling system according to claim 1, characterized in that: The storage tank (1) is also provided with an on-site pressure gauge (10), an on-site liquid level gauge (11), a liquid level transmitter (12) and a thermometer (13).

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