阅读说明：本技术 水膜重构管式蒸发冷却器 (Water film reconstruction tube type evaporative cooler ) 是由 于博 何叶从 石尔 张晓烽 赵万东 于 2019-11-14 设计创作，主要内容包括：本发明提供一种水膜重构管式蒸发冷却器,包括布水系统、水膜重构系统、换热盘管、水膜重构系统支架、换热盘管支架和安全附件构成,所述布水系统包括吸水口、水泵、第一布水器、第二布水器、第三布水器和储水槽,所述水膜重构系统包括初水膜形成装置,第一水膜重构装置、第二水膜重构装置,所述换热盘管由多组并联的单元盘管构成,在单元盘管高度方向上依次垂直布置初水膜形成装置,第一水膜重构装置、第二水膜重构装置,喷淋水由第一布水器喷出,经初水膜形成装置,第一水膜重构装置和第二水膜重构装置,在水膜重构管式蒸发冷却器表面形成均匀、完整水膜,实现高效换热。(The invention provides a water film reconstruction tubular evaporative cooler, which comprises a water distribution system, a water film reconstruction system, a heat exchange coil, a water film reconstruction system bracket, a heat exchange coil bracket and a safety accessory, wherein the water distribution system comprises a water suction port, a water pump, a first water distributor, a second water distributor, a third water distributor and a water storage tank, the water film reconstruction system comprises an initial water film forming device, a first water film reconstruction device and a second water film reconstruction device, the heat exchange coil is formed by a plurality of groups of unit coils which are connected in parallel, the initial water film forming device, the first water film reconstruction device and the second water film reconstruction device are sequentially and vertically arranged in the height direction of the unit coils, spray water is sprayed by the first water distributor and passes through the initial water film forming device, the first water film reconstruction device and the second water film reconstruction device to form uniform and complete water films on the surface of the water film reconstruction tubular evaporative cooler, realizing high-efficiency heat exchange.)

1. The water film reconstruction tubular evaporative cooler comprises a water distribution system, a water film reconstruction system, a heat exchange coil, a water film reconstruction system support, a heat exchange coil support and a safety accessory, and is characterized in that: the water distribution system comprises a water suction port (1), a water pump (2), a first water distributor (3), a second water distributor (4), a third water distributor (5) and a water storage tank (6), wherein the first water distributor (3), the second water distributor (4) and the third water distributor (5) are arranged in parallel, the water film reconstruction system comprises an initial water film forming device (12), a first water film reconstruction device (13) and a second water film reconstruction device (14), the initial water film forming device (12), the first water film reconstruction device (13) and the second water film reconstruction device (14) are arranged in parallel, the initial water film forming device (12), the first water film reconstruction device (13) and the second water film reconstruction device (14) can adopt a plate-type water film structure reconstruction system and a groove-type water film reconstruction system, the heat exchange coil is formed by a plurality of groups of unit coils (9) which are connected in parallel, the initial water film forming device (12) is sequentially and vertically arranged in the height direction of the unit coils (9), the system comprises a first water film reconstruction device (13) and a second water film reconstruction device (14), wherein the inlet and the outlet of a unit coil (9) which are arranged in parallel are respectively provided with a liquid dividing pipe (7) and a liquid collecting pipe (8), the liquid dividing pipe (7) and the liquid collecting pipe (8) are respectively connected with the unit coil (9) through a liquid dividing movable joint (10) and a liquid collecting movable joint (18), a water film reconstruction system support comprises a left support (15), a right support (16), a front guide rail (27) and a rear guide rail (17), the left end, the right end, the front end and the rear end of an initial water film forming device (12), the first water film reconstruction device (13) and the second water film reconstruction device (14) are respectively connected with the left support (15), the right support (16), the front guide rail (27) and the rear guide rail (17), high-temperature media enter the unit coil which is arranged in parallel through the liquid dividing pipe (7) and are, the spray water is sprayed out from the first water distributor (3) and forms a water film on the surface of the water film reconstruction tubular evaporative cooler through the primary water film forming device (12), the first water film reconstruction device (13) and the second water film reconstruction device (14).

2. The water film restructured tube evaporative cooler of claim 1, wherein: the second water distributor (4) and the third water distributor (5) determine the setting height, the opening period and the water distribution quantity according to the load born by the water film reconstruction evaporative cooler.

3. The water film restructured tube evaporative cooler of claim 1, wherein: the first water film reconstruction device (13) and the second water film reconstruction device (14) determine the setting height and the widths of the first water film reconstruction water outlet (25) and the second water film reconstruction water outlet (26) according to the load borne by the water film reconstruction evaporative cooler.

4. The water film restructured tube evaporative cooler of claim 1, wherein: the plate-type structure water film reconstruction system is composed of a plurality of water distribution grooves (28) which are arranged in parallel, the number of the water distribution grooves (28) is the same as that of the unit coil pipes (9), each water distribution groove (28) is provided with a plate-type water collection groove (19) which takes the central line of the unit coil pipe (9) as a symmetrical axis and inclines to the unit coil pipe (9), and a plate-type water outlet (30) is arranged between the plate-type water collection groove (19) and the unit coil pipe (9).

5. The water film restructured tube evaporative cooler of claim 1, wherein: the water film reconstruction system with the groove type structure is composed of a left water distribution groove (15) and a right water distribution groove (16) which are arranged in parallel, the front end and the rear end of the left water distribution groove (15) and the right water distribution groove (16) are respectively connected with a front guide rail (27) and a rear guide rail (17), a groove type water collecting groove (20) which takes a central line of a unit coil pipe (9) as a symmetrical shaft and inclines to the unit coil pipe (9) is arranged on the left water distribution groove (15) and the right water distribution groove (16), and a groove type water outlet (29) is formed between the groove type water collecting groove (20) and the unit coil pipe (9).

Technical Field

The invention provides a water film reconstruction tubular evaporative cooler, belongs to the field of heat exchangers, and aims to solve the problem of low heat exchange efficiency caused by poor uniformity and integrity of a water film on the surface of the evaporative cooler under high-speed airflow.

Background

The existing evaporative cooler mostly adopts water distribution at the top of a heat exchange coil, because of the action of surface tension and viscous force, the uniformity and integrity of a water film on the surface of the evaporative cooler are not ideal enough, and the local part is even a dry surface.

Aiming at the problem of poor uniformity and integrity of a water film on the surface of the existing evaporative cooler, the subject group of the applicant proposes that water is distributed on the side surface of a heat exchanger by using an evaporative water compensator (ZL2009103003918), so that the uniformity and integrity of the water film are remarkably improved, and the mass transfer driving force is improved. However, the evaporation water replenishing device utilizes the counterforce of water drops sprayed out from the nozzle at a high speed to push the device to automatically rotate, so that the pressure and the air quantity of compressed air are very large, and the air pressure is far greater than the pressure required by spraying, so that the power of the air compressor is increased sharply, and the energy waste is serious. More seriously, the rotating body of the water distribution device is sleeved on the water inlet channel, the rotating body and the outer wall of the water inlet channel form a cavity, and the rotating body is supported by a bearing, so that the friction force and the sealing property of a moving part and a static part of the device and the driving force of the device form a series of problems of mutual restriction: 1) if the sealing performance is required to be good, the friction force of the device is increased sharply, the power required by the rotation of the pushing device is also increased sharply, and the power of the air compressor is increased sharply; 2) if the sealing performance is required to be poor, the leakage is serious, a large amount of compressed air is wasted, and the power of a motor required by the compressor is increased; 3) micro impurities in water or compressed air or fine metal chips generated in the rotation motion of the device can be easily clamped in a gap between the moving part and the static part, so that the device frequently stops rotating, the heat exchanger cannot exhaust heat, and the safety of a unit is influenced; 4) the leakage of the water distributor can lead the lubricating oil of the bearing to be splashed to the surface of the heat exchanger, and the uniformity and the integrity of a water film are seriously weakened; 5) premature contact of the compressed air with the water causes air leakage from the tank side and water to be forced back into the tank and have to raise the pump pressure to approximately the compressed air pressure, much greater than the economic pressure required for atomization.

In order to solve the problems, the applicant proposes to provide rotary power by using a motor, solves the problems of high operation energy consumption, unstable operation and the like, and develops a series of equipment technologies such as a rotary water distributor (ZL2011103411312), a two-side rotary water distributor air atomization delivery and distribution device (ZL2013201382945), a two-side rotary water distributor pressure atomization delivery and distribution device (ZL2013201382945) and a two-side rotary water distribution indirect evaporation cooler (201ZL 3203021386) based on the scheme. The series of technologies solve all the problems of the evaporative water replenishing device (ZL2009103003918), the performance of the existing evaporative cooler is improved by about 80%, but the utilization rate of the heat removal capacity of air is lower than a limit value expected by research, and after the limit value, no matter how the water film performance is strengthened, the heat exchange efficiency is not improved any more and even reduced in some cases (national science foundation project: 51406015), and the reason is that: 1. the water distribution on the two sides obviously improves the water film performance and strengthens the heat exchange between the water film and the wall surface, and simultaneously spray water droplets still weaken the latent heat exchange capacity of air to a certain extent, and partial atomized droplets directly carry out heat and mass exchange with the air without participating in the removal of the heat of a high-temperature medium in the evaporative cooler, so that the heat extraction capacity of the air cannot be utilized to the maximum extent; 2. the heat exchange coefficient between the water film and the wall surface is too small, and the heat exchange between the water film and the wall surface needs to be further strengthened.

In view of the excellent heat exchange performance of the 'two-side rotary water distribution indirect evaporative cooler (ZL 2013201383026)', the device is arranged in an underground air exhaust tunnel of an air conditioner of a subway station, the engineering problem that the cooling tower is arranged at a position which meets the setting requirement of the cooling tower and is coordinated with the surrounding environment is difficult to find on the ground in the subway engineering construction is solved, the air conditioner exhaust energy of the subway station is recycled, and the initial investment of the subway station construction and the operation energy consumption of an air conditioning system are reduced. Research finds that when the equipment is applied to an air conditioning system of underground subway engineering, the heat exchange performance of the equipment is far lower than that of the equipment applied to other air conditioning engineering, the error of a medium-sized or large-sized evaporative cooler is particularly obvious, the prior art of the equipment is not suitable for the underground subway air conditioning engineering, and the main reason for generating the problem is that: 1. the air speed in the subway exhaust tunnel is far higher than that of the existing evaporative cooler, and the uniformity and integrity of the water film on the surface of the evaporative cooler under high-speed airflow are far lower than those of the water film at the conventional airflow speed; 2. in order to not increase the resistance of the exhaust system of the subway station, the applicant slightly increases the distance between the coils, further aggravates the nonuniformity of the water film on the surface of the evaporative cooler, simultaneously leads the water floating phenomenon to be more serious, seriously weakens the heat and mass transfer capacity of the water film and the air, has low utilization rate of the heat removal capacity of the air, and greatly increases the energy consumption of the exhaust system of the subway station if the distance between the coils is not increased; 3. the water film distribution in the height direction of the evaporation cooler coil is particularly uneven, after the evaporation cooler coil is at a certain height, the water film on the surface of the coil is linearly distributed, the flow rate is extremely low, the heat exchange coefficient between the water film and air is low, and the heat of high-temperature media in the evaporation cooler cannot be efficiently discharged, so that the performance of the heat exchanger is low.

Therefore, under the condition of high-speed airflow, how to form an even and complete water film on the surface of the evaporative cooler and not generate the problem of floating water is the key for ensuring the evaporative cooler to realize high-efficiency heat exchange under the condition of high-speed airflow by increasing the heat exchange coefficient of the water film and the surface of the evaporative cooler as much as possible.

Disclosure of Invention

The invention aims to provide a water film reconstruction tubular evaporative cooler for solving the problems, which comprises the following specific steps:

a water film reconstruction tube type evaporative cooler comprises a water distribution system, a water film reconstruction system, a heat exchange coil, a water film reconstruction system bracket, a heat exchange coil bracket and a safety accessory, wherein the water distribution system comprises a water suction port, a water pump, a first water distributor, a second water distributor, a third water distributor and a water storage tank, the first water distributor, the second water distributor and the third water distributor are arranged in parallel, the water film reconstruction system comprises an initial water film forming device, a first water film reconstruction device and a second water film reconstruction device, the initial water film forming device, the first water film reconstruction device and the second water film reconstruction device can adopt a plate-type structure water film reconstruction system and a groove-type structure water film reconstruction system, the heat exchange coil is composed of a plurality of groups of unit coils which are connected in parallel, the initial water film forming device is sequentially and vertically arranged in the height direction of the unit coils, the first water film reconstruction device and the second water film reconstruction device, the inlet and the outlet of the unit coil pipes which are arranged in parallel are respectively provided with a liquid distribution pipe and a liquid collection pipe, the liquid distribution pipe and the liquid collection pipe are respectively connected with the unit coil pipes through liquid distribution movable joints and liquid collection movable joints, the water film reconstruction system bracket comprises a left bracket, a right bracket, a front guide rail and a rear guide rail, the left end, the right end, the front end and the rear end of the initial water film forming device, the first water film reconstruction device and the second water film reconstruction device are respectively connected with the left bracket, the right bracket, the front guide rail and the rear guide rail, high-temperature media enter the unit coil pipes which are arranged in parallel through the liquid distribution pipes and are converged and flow out by the liquid collection pipes, spray water is sprayed out by the first water distributor and passes through the initial water film forming device, an even and complete water film is formed on the surface of the water film reconstruction tubular evaporative cooler, and high-efficiency heat exchange is realized.

Furthermore, the second water distributor and the third water distributor determine the setting height, the opening period and the water distribution quantity according to the load born by the water film reconstruction evaporative cooler.

Furthermore, the first water film reconstruction device and the second water film reconstruction device determine the setting height and the width of the first water film reconstruction water outlet and the second water film reconstruction water outlet according to the load born by the water film reconstruction evaporative cooler.

Furthermore, the water film reconfiguration system with the plate-type structure is composed of a plurality of water distribution grooves which are arranged in parallel, the number of the water distribution grooves is the same as that of the unit coil pipes, each water distribution groove is provided with a plate-type water collection groove which takes the central line of the unit coil pipe as a symmetry axis and inclines towards the unit coil pipe, and a plate-type water outlet is arranged between each plate-type water collection groove and the unit coil pipe.

Furthermore, the water film reconfiguration system with the groove type structure is composed of a left water distribution groove and a right water distribution groove which are arranged in parallel, the front ends and the rear ends of the left water distribution groove and the right water distribution groove are respectively connected with the front guide rail and the rear guide rail, groove type water collection grooves which use the central line of the unit coil pipe as a symmetry axis and slope to the unit coil pipe are arranged on the left water distribution groove and the right water distribution groove, and a groove type water outlet is arranged between the groove type water collection grooves and the unit coil pipe.

The main innovation points of the invention are as follows:

based on the load born by the water film reconstruction tubular evaporative cooler and the formation, development and evolution conditions of the uniformity, integrity, flow speed and thickness of the water film in the height direction of the coil, an initial water film forming device is utilized to form an even water film on the surface of the water film reconstruction tubular evaporative cooler, when the water film is not developed uniformly enough, a first water film reconstruction device is utilized to reconstruct the water film for the first time, when the water film is developed uniformly enough again, a second water film reconstruction device is utilized to form an even water film for the second time in the height direction of the coil, and the water film in the height direction of the water film reconstruction tubular evaporative cooler is ensured to be kept uniform and complete all the time.

During the process of reconstructing the water film, the setting height, the opening period and the water distribution quantity of the second water distributor and the third water distributor are determined based on the allowable water film temperature fluctuation range of the load borne by the water film reconstruction tubular evaporative cooler, and the heat extraction capacity of air is utilized to the maximum extent.

During the process of reconstructing the water film, the initial water film speed of the initial water film forming device, the first water film reconstructing device and the second water film reconstructing device is optimized, the water film speed is optimized based on the uniformity and integrity indexes of the water film, and the heat exchange coefficient of the water film and the wall surface is improved as much as possible.

The main advantages of the invention are:

under high-speed airflow, the surface of the water film reconstruction tubular evaporative cooler is ensured to form a uniform and complete water film, the heat exchange coefficient of the water film and the wall surface is improved as much as possible, and the heat removal capacity of the water film and air is utilized to the maximum extent.

The method solves the engineering problem that the cooling tower is difficult to be installed at the position which meets the setting requirement of the cooling tower and is coordinated with the surrounding environment in the underground engineering construction such as subway engineering and the like, and provides a feasible exhaust treatment scheme and equipment for realizing the stealth of the underground military construction.

The energy of air-conditioning exhaust of underground buildings such as subways and the like is recovered, and the initial investment and the operation energy consumption of the project are reduced.

Drawings

FIG. 1 is a schematic front view of a water film restructuring plate evaporative cooler according to a first embodiment of the present invention;

FIG. 2 is a schematic top view of a water film restructuring plate evaporative cooler in accordance with a first embodiment of the present invention;

FIG. 3 is a schematic top view of a water film restructuring plate evaporative cooler in accordance with a second embodiment of the present invention;

fig. 4 is a schematic structural view of a water film restructuring plate type evaporative cooler according to a second embodiment of the present invention.

Detailed Description

The water film reconstruction tubular evaporative cooler of the invention is explained in one step with the attached drawings: