阅读说明：本技术 带双预冷系统的镶嵌泡沫翅片板的蒸发式冷凝器及方法 (Evaporative condenser with double precooling systems and embedded foam fin plates and method ) 是由 宋张扬 蒲文灏 陶开利 陈恺祺 杨宇 姚海沉 邢小龙 于 2021-01-12 设计创作，主要内容包括：本发明公开了一种带双预冷系统的镶嵌泡沫翅片板的蒸发式冷凝器及方法,属于冷凝器技术领域。主要包括空气预冷系统、喷淋水预冷系统、蒸发冷凝系统。空气在箱体左侧第一风机的作用下进入空气预冷系统,经遇冷后进入蒸发冷凝系统,水槽中的水在增压水泵的作用下,经过喷淋水预冷系统后进入蒸发冷凝系统。同时,在第二风机的作用下,空气分别流经三个系统的换热管束,促进换热管外水膜的蒸发吸热。纵向换热管排之间镶嵌泡沫翅片板,有效提高换热面积,易形成连续水膜,消除水管底部干斑。三个蒸发系统在同一个箱体内,结构紧凑。(The invention discloses an evaporative condenser with a double precooling system and a foam fin plate embedded therein and a method, and belongs to the technical field of condensers. The system mainly comprises an air precooling system, a spray water precooling system and an evaporation and condensation system. Air enters the air pre-cooling system under the action of the first fan on the left side of the box body, enters the evaporation and condensation system after encountering cold, and water in the water tank enters the evaporation and condensation system after passing through the spray water pre-cooling system under the action of the booster water pump. Meanwhile, under the action of the second fan, air flows through the heat exchange tube bundles of the three systems respectively, and evaporation and heat absorption of water films outside the heat exchange tubes are promoted. The foam fin plates are embedded between the longitudinal heat exchange tube rows, so that the heat exchange area is effectively increased, a continuous water film is easily formed, and dry spots at the bottom of the water tube are eliminated. The three evaporation systems are in the same box body, and the structure is compact.)

1. The utility model provides an evaporative condenser of two precooling systems in area's inlay foam fin board, is including installing air precooling system (2), spray water precooling system (3) and evaporative condensing system (1) in the box, its characterized in that:

the top of the left side wall of the box body is provided with a first air inlet, the lower part of the left side wall of the box body is provided with a second air inlet, and the lower part of the right side wall of the box body is provided with an air outlet;

the air pre-cooling system (2) is positioned at the upper left side in the box body and consists of a first fixed point spraying device (6), a first heat exchange coil (7), a first foam fin plate (14) and a first fan (12); the first fixed point spraying device (6) is positioned at the right lower part of the first air inlet; the first heat exchange coil (7) is positioned right below the first fixed point spraying device (6); the first foam fin plate (14) is embedded between the longitudinally adjacent tube rows of the first heat exchange coil (7); the first fan (12) is positioned in the middle of the left side wall of the box body and is connected with the inlet at the lower side of the first heat exchange coil (7);

the evaporative condensation system (1) is positioned at the upper right side inside the box body, a baffle (16) is arranged between the evaporative condensation system (1) and the air pre-cooling system (2), and the top of the baffle (16) is connected with an outlet of the first heat exchange coil (7) and serves as an air inlet of the evaporative condensation system (1); the evaporation and condensation system (1) consists of a second fixed-point spraying device (4), a second heat exchange coil (5), a second foam fin plate (13) and a second fan (11); the second fixed point spraying device (4) is positioned at the right lower part of an air inlet of the evaporation and condensation system (1), and the second heat exchange coil (5) is positioned under the second fixed point spraying device (4); the second foam fin plate (13) is embedded between the longitudinal adjacent tube rows of the second heat exchange coil (5); the second fan (11) is positioned at an air outlet at the lower part of the right side wall of the box body;

the spray water precooling system (3) is positioned on the surface of a bottom water tank in the box body and consists of a booster water pump (9), a third heat exchange coil (15), high water absorption fibers (8) and a second fan (11); the third heat exchange coil (15) is positioned on the surface of the water tank, the inlet of the third heat exchange coil is connected with a booster water pump (9) at the bottom of the water tank, and the outlet of the third heat exchange coil is connected with the first fixed point spraying device (6) and the second fixed point spraying device (4) above the tank body through pipelines; the high water absorption fiber (8) is wrapped on the surface of the third heat exchange coil (15), and the bottom of the high water absorption fiber (8) is placed in the water tank;

the bottom of the second fan (11) and the third heat exchange coil (15) are at the same height, and a water baffle (10) is arranged on the left side of the second fan (11).

2. The evaporative condenser with double precooling systems and inlaid foam fin plates as claimed in claim 1, wherein: the surface of the foam fin plate contains a thread structure for increasing the heat exchange area and the water film turbulence intensity.

3. The evaporative condenser with double precooling systems and inlaid foam fin plates as claimed in claim 1, wherein: a plurality of outflow round holes are formed in the bottom of a water pipe in the first fixed point spraying device (6), and the positions of the outflow round holes are right above each longitudinal row of the first heat exchange coil (7); the bottom of a water pipe in the second fixed-point spraying device (4) is provided with a plurality of outflow round holes, and the positions of the outflow round holes are right above each longitudinal row of the second heat exchange coil pipes (5).

4. The evaporative condenser with double precooling systems and inlaid foam fin plates as claimed in claim 1, wherein: the size of the first fixed point spraying device (6) is smaller than that of the second fixed point spraying device (4).

5. The operating method of the evaporative condenser with the double precooling system and the embedded foam fin plate as claimed in claim 1, is characterized by comprising the following working processes:

under the action of a first fan (12), air enters a first heat exchange coil (7) in the air pre-cooling system (2); spray water drops through the first fixed point spray device (6), a continuous water film is formed outside the first heat exchange coil (7), air entering from the first air inlet and located outside the first heat exchange coil (7) flows in the same direction with the water film under the action of the second fan (11), the water film is promoted to evaporate and absorb sensible heat of the air in the first heat exchange coil (7), and the air in the first heat exchange coil (7) flows to the upper part of the second fixed point spray device (4) through an outlet in the upper part of the baffle (16) after being precooled;

spray water drops through the second fixed point spray device (4), a continuous water film is formed outside the second heat exchange coil (5), and precooled air flows through the evaporation and condensation system (1) under the action of the second fan (11) to promote evaporation of the water film and realize refrigeration; after air respectively flows through the air pre-cooling system (3) and the evaporative condensation system (1), under the action of the second fan (11), the air blows through the third heat exchange coil (15), meanwhile, the air entering from the second air inlet flows through the surface of the water tank, evaporation of water in the super-absorbent fibers (8) is promoted, the temperature of spraying water in the third heat exchange coil (15) is reduced, and the pre-cooled spraying water flows to the first fixed point spraying device (6) and the second fixed point spraying device (4) under the action of the booster water pump (9).

Technical Field

The invention belongs to the technical field of condensers, and particularly relates to an evaporative condenser with a double precooling system and a method for embedding a foam fin plate.

Background

With the development of national economy, the demand of China for energy and natural resources is increased greatly, the water resource of China is very short, the phenomenon of water shortage in industry is particularly serious, and industrial cooling water occupies more than 70% of the total industrial water. Under the same circumstances, evaporative condenser technology has gained increasing attention, and evaporative condensers are efficient condensers which utilize water to evaporate and absorb latent heat to cool media, and theoretically, the water consumption of evaporative cooling is only 5% -10% of that of water-cooled condensers. Therefore, the development of the efficient evaporative condenser has important significance for saving water resources in industry.

Disclosure of Invention

The invention provides a novel evaporative condenser with a double precooling system and a foam fin plate embedded. Compact structure, improved refrigerating capacity, reduced energy consumption, easy formation of continuous water film, reduced dry spot, and reduced scale formation.

An evaporative condenser with double precooling systems and embedded foam fin plates comprises an air precooling system, a spray water precooling system and an evaporative condensing system which are arranged in a box body. The top of the left side wall of the box body is provided with a first air inlet, the lower part of the left side wall of the box body is provided with a second air inlet, the lower part of the right side wall of the box body is provided with an air outlet, and the three systems are arranged in one box body, share one fan and are compact in structure.

The air precooling system is positioned at the left upper side in the box body and consists of a first fixed point spraying device, a first heat exchange coil, a first foam fin plate and a first fan; the first fixed point spraying device is positioned at the right lower part of the first air inlet, and air entering from the first air inlet and spray water dropping from the first fixed point spraying device form a forward flow, so that a continuous water film can be formed outside the pipe, and evaporation is promoted; the first heat exchange coil is positioned right below the first fixed point spraying device; the first foam fin plate is embedded between the longitudinally adjacent tube rows of the first heat exchange coil, so that dry spots at the bottom of the heat exchange tube can be eliminated, a continuous water film is formed, and scaling is reduced; the first fan is positioned in the middle of the left side wall of the box body and connected with the lower side inlet of the first heat exchange coil;

the evaporation and condensation system is positioned at the upper right side in the box body, a baffle is arranged between the evaporation and condensation system and the air pre-cooling system, and the top of the baffle is connected with an outlet of the first heat exchange coil and is used as an air inlet of the evaporation and condensation system; the evaporative condensation system consists of a second fixed point spray device, a second heat exchange coil, a second foam fin plate and a second fan; the second fixed point spraying device is positioned at the right lower part of the air inlet of the evaporation and condensation system, the second heat exchange coil is positioned under the second fixed point spraying device, so that sprayed water outside the heat exchange pipe can flow in the same direction with air, and the air is wrapped outside the water film, thereby being beneficial to forming a continuous water film; the second foam fin plate is embedded between the longitudinally adjacent tube rows of the second heat exchange coil, so that dry spots at the bottom of the heat exchange tube can be eliminated, a continuous water film is formed, and scaling is reduced; the second fan is positioned at the air outlet at the lower part of the right side wall of the box body;

the spray water precooling system is positioned on the surface of a bottom water tank in the box body and consists of a booster water pump, a third heat exchange coil, high water absorption fibers and a second fan; the third heat exchange coil is positioned on the surface of the water tank, the inlet of the third heat exchange coil is connected with a booster water pump at the bottom of the water tank, and the outlet of the third heat exchange coil is connected with the first fixed point spraying device and the second fixed point spraying device above the box body through pipelines; the high water absorption fiber is wrapped on the surface of the third heat exchange coil, the bottom of the high water absorption fiber is placed in the water tank, water on the surface of the water tank is adsorbed to the surface of the third heat exchange coil through the strong water absorption of the high water absorption fiber to form a water film, and the water film temperature in the third heat exchange coil is reduced through water film evaporation.

The bottom of the second fan and the third heat exchange coil are at the same height, so that air entering from the second air inlet is directly blown to the surface of the third heat exchange coil, and water film evaporation is promoted. And a water baffle is arranged on the left side of the second fan.

The working method of the evaporative condenser with the double precooling systems and the embedded foam fin plates is characterized by comprising the following working processes:

under the action of a first fan, air enters a first heat exchange coil in an air precooling system; the spray water drops through the first fixed point spray device, a continuous water film is formed outside the first heat exchange coil, air entering from the first air inlet and positioned outside the first heat exchange coil flows in the same direction as the water film under the action of the second fan, the water film is promoted to evaporate and absorb sensible heat of the air in the first heat exchange coil, and the air in the first heat exchange coil is precooled and then flows to the upper part of the second fixed point spray device through an outlet at the upper part of the baffle;

the spray water drops through the second fixed point spray device, a continuous water film is formed outside the second heat exchange coil, and the precooled air flows through the evaporation and condensation system under the action of the second fan, so that the evaporation of the water film is promoted, and the refrigeration is realized; after air respectively flows through the air pre-cooling system and the evaporation and condensation system, under the action of the second fan, the air blows through the third heat exchange coil, meanwhile, the air entering from the second air inlet flows through the surface of the water tank, evaporation of water in the super-absorbent fibers is promoted, the temperature of spray water in the third heat exchange coil is reduced, and the pre-cooled spray water flows to the first fixed point spray device and the second fixed point spray device under the action of the booster water pump.

The evaporative condenser with the double precooling systems and the embedded foam fin plates is characterized in that: through the surface at foam fin board increase helicitic texture, increase heat transfer area and water film torrent intensity promote the water film evaporation.

The evaporative condenser with the double precooling systems and the embedded foam fin plates is characterized in that: a plurality of outflow round holes are formed in the bottom of a water pipe in the first fixed point spraying device, and the positions of the outflow round holes are right above each longitudinal row of the first heat exchange coil; the bottom of a water pipe in the second fixed-point spraying device is provided with a plurality of outflow round holes, and the positions of the outflow round holes are right above each longitudinal row of the second heat exchange coil pipes. Spray water in the pipe vertically drops to the top of the heat exchange pipe right below in a liquid drop mode, water is saved, and through the spraying mode, the spray water is uniformly distributed on the surface of the heat exchange pipe, so that continuous water films are formed, and water film evaporation is promoted.

The evaporative condenser with the double precooling systems and the embedded foam fin plates is characterized in that: the size of the first fixed point spraying device is smaller than that of the second fixed point spraying device, most of the spraying water is distributed into the evaporation and condensation system, and condensation of the refrigerant in the heat exchange pipe is promoted.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a third heat exchange coil and superabsorbent fibers;

FIG. 3 is a schematic structural view of a first fixed point spray device, a first heat exchange coil and a first foam fin plate;

number designation in the figures: 1. the system comprises an evaporation and condensation system, a 2 air precooling system, a 3 spray water precooling system, a 4 second fixed point spray device, a 5 second heat exchange coil, a 6 first fixed point spray device, a 7 first heat exchange coil, a 8 high water absorption fiber, a 9 booster water pump, a 10 water baffle, a 11 second fan, a 12 first fan, a 13 second foam fin plate, a 14 first foam fin plate, a 15 third heat exchange coil and a 16 baffle.

Detailed description of the invention

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is made with reference to fig. 1, 2 and 3.

A first fixed point spraying device 6 is arranged right above each longitudinal row of the first heat exchange coil 7. And a second fixed point spraying device 4 is arranged right above each longitudinal row of the second heat exchange coil 5. The bottoms of the water pipes in the first fixed point spraying device 6 and the second fixed point spraying device 4 are provided with a plurality of outflow round holes, spray water in the pipes vertically drops to the top of the heat exchange pipe right below in a liquid drop mode, and the spray water is distributed more uniformly in the spraying mode. The spray water flows downwards along the first foam fin plate 14 and the second foam fin plate 13 which are embedded between the longitudinal tube rows, so that a continuous water film is easily formed, the heat exchange area is increased, dry spots at the bottoms of the second heat exchange coil 5 and the first heat exchange coil 7 are eliminated, and scaling is reduced.

The third heat exchange coil 15 is placed on the water surface of the water tank, the high water absorption fibers 8 are wrapped on the third heat exchange coil 15, and the bottoms of the high water absorption fibers 8 are placed in the water tank.

The invention mainly comprises an air precooling system 2, a spray water precooling system 3 and an evaporation condensing system 1. Under the action of a first fan, air passes through a first heat exchange coil 7 in the air pre-cooling system 2, spray water drops through a first fixed point spray device 6 to form a continuous water film outside the pipe, the air outside the pipe flows in the same direction as the water film under the action of a second fan 11 to promote the water film to evaporate and absorb sensible heat of the air inside the pipe, and the air inside the pipe flows to the upper part of a second fixed point spray device 4 through an outlet at the upper part of a baffle 16 after being pre-cooled; the spray water drops through the second fixed point spray device 4, a continuous water film is formed outside the second heat exchange coil 5, and the precooled air flows through the evaporation and condensation system 1 under the action of the second fan 11, so that the evaporation of the water film is promoted, and the refrigeration is realized; after air respectively flows through the air pre-cooling system 3 and the evaporative condensation system 1, under the action of the second fan 11, the air blows through the third heat exchange coil 15, meanwhile, inlet air at the left side of the third heat exchange coil 15 flows through the surface of the water tank, evaporation of water in the super water absorption fibers 8 is promoted, the temperature of spraying water in the third heat exchange coil 15 is reduced, and pre-cooled spraying water flows to the first fixed point spraying device 6 and the second fixed point spraying device 4 under the action of the booster water pump 9.

The foregoing is merely an exemplary embodiment of the present invention, and it is emphasized that those skilled in the art can make modifications and variations without departing from the technical principle of the present invention.