CN110822604B - Heat source built-in falling film humidifier and working method thereof - Google Patents
Heat source built-in falling film humidifier and working method thereof Download PDFInfo
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- CN110822604B CN110822604B CN201911105432.8A CN201911105432A CN110822604B CN 110822604 B CN110822604 B CN 110822604B CN 201911105432 A CN201911105432 A CN 201911105432A CN 110822604 B CN110822604 B CN 110822604B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
- F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
- F24F6/08—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using heated wet elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
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- Chemical & Material Sciences (AREA)
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Abstract
本发明公开了一种热源内置式降膜加湿器及其工作方法，属于加湿除湿技术领域。该加湿器主要包括筒体、顶板和底板，其特征在于：筒体内部位于顶板和底板之间由上而下还设置有分布器、上板和收集器，并且在分布器和收集器之间设有若干换热管。当液体进入加湿器后能够在换热管外壁上形成良好的液膜，并与换热管内的热流体有效换热，随着重力下降其温度不断上升，因此可以与换热管间的空气流进行高效的传热传质。本发明以热源内置的方式进行加湿可以保证热量充分被两相流体吸收，不仅提高了换热效率，还简化了设备空间，降低了加湿系统能耗。该加湿器结构紧凑新颖，换热效率高，压降小，对于节能减排、产业升级换代具有重大意义。
The present invention discloses a heat source built-in falling film humidifier and a working method thereof, belonging to the technical field of humidification and dehumidification. The humidifier mainly comprises a cylinder, a top plate and a bottom plate, and is characterized in that: a distributor, an upper plate and a collector are also arranged from top to bottom inside the cylinder between the top plate and the bottom plate, and a plurality of heat exchange tubes are arranged between the distributor and the collector. When the liquid enters the humidifier, it can form a good liquid film on the outer wall of the heat exchange tube and effectively exchange heat with the hot fluid in the heat exchange tube. As the gravity decreases, its temperature continues to rise, so it can efficiently transfer heat and mass with the air flow between the heat exchange tubes. The present invention performs humidification in a heat source built-in manner to ensure that the heat is fully absorbed by the two-phase fluid, which not only improves the heat exchange efficiency, but also simplifies the equipment space and reduces the energy consumption of the humidification system. The humidifier has a compact and novel structure, high heat exchange efficiency, and small pressure drop, which is of great significance for energy conservation and emission reduction and industrial upgrading.
Description
Technical Field
The invention relates to the technical field of humidification and dehumidification, in particular to a falling film humidifier with a built-in heat source.
Background
With the continuous improvement of the living standard and the industrial production level of people, environmental regulation is increasingly important, and air temperature and humidity are taken as important indicators of the environment, so that attention is paid to the environment. The use of humidifiers to regulate air temperature and humidity is an effective approach. Patent number CN201510042152.2 discloses a spray humidifier, which has low heat exchange efficiency and poor humidifying effect although the pressure drop is small and the structure is simplified. Subsequently, CN201611214327.4 discloses a packing humidifier suitable for a seawater evaporation concentration system, which has high heat exchange efficiency and large humidification amount, but has a large pressure drop. And the spray humidifier and the filler humidifier are powered by external heating, so that the equipment occupies large area, the investment is high, and the operation is complex.
Under the large background of energy conservation, emission reduction and industry upgrading, how to improve the heat exchange efficiency of the humidifier, reduce the energy consumption and accelerate the equipment upgrading is a problem to be solved urgently.
Disclosure of Invention
The invention provides a falling film humidifier with a built-in heat source aiming at the defects of the existing humidifier, and the humidifier has the advantages of compact and novel structure, high heat exchange efficiency and reduced pressure, and is a good supplement for industrial upgrading.
The utility model provides a built-in falling film humidifier of heat source, mainly includes the barrel, and the barrel has bottom plate and roof, its characterized in that: a liquid outlet is arranged at the center of the bottom plate, the center of the top plate is provided with a heat source inlet; the wall surface of the upper part of the cylinder body is respectively provided with an air outlet and a plurality of symmetrical liquid inlets from top to bottom; the wall surface of the lower part of the cylinder is respectively provided with a plurality of symmetrical air inlets and a single heat source outlet from top to bottom; the inside of the cylinder is positioned between the top plate and the bottom plate, and is sequentially provided with a distributor, an upper plate and a collector from top to bottom; wherein the distributor is positioned between the air outlet and the liquid inlet; wherein the upper plate is positioned at the upper part of the cylinder body and below the liquid inlet; wherein the collector is located between the air inlet and the heat source outlet; the upper plate is distributed with a plurality of nozzles; the distributor and the collector are of a cavity structure; a plurality of heat exchange pipes are arranged between the distributor and the collector, the heat exchange pipes are in one-to-one correspondence with the nozzles, and the heat exchange pipes penetrate through the nozzles; the upper top surface of the distributor is communicated with the heat source inlet, and the lower bottom surface of the distributor is communicated with the upper part of the heat exchange tube; the upper top surface of the collector is communicated with the lower part of the heat exchange tube, and the lower bottom surface of the collector is communicated with the heat source outlet; wherein the distributor is provided with a plurality of air outlet holes around the heat exchange tube; a plurality of liquid outlet holes are arranged around the heat exchange tube on the collector; the upper plate is also provided with a plurality of gas channel pipes which are in one-to-one correspondence with the air outlet holes on the distributor.
The working method of the heat source built-in falling film humidifier is characterized by comprising the following working processes: firstly, a hot fluid enters a cavity of a distributor through a heat source inlet on a top plate, then uniformly enters a heat exchange tube, the heat exchange hot fluid is collected into a collector, and finally is discharged from a heat source outlet; the low-temperature liquid enters between the distributor and the upper plate from the liquid inlet, is sprayed on the outer wall of the heat exchange tube through the nozzle to form a uniform liquid film, and is fully heat-exchanged with hot fluid in the heat exchange tube along with the descending of the liquid film, the temperature is continuously increased, and finally is collected on the upper surface of the collector, enters the bottom of the cylinder through the liquid outlet, and finally is discharged out of the cylinder through the liquid outlet on the bottom plate; the low-temperature low-humidity air enters between the tube bundles consisting of a plurality of heat exchange tubes through the air inlet at the bottom of the cylinder, and in the air rising process, the temperature and the humidity are continuously increased through heat and mass transfer with the liquid film, and finally the high-temperature high-humidity air firstly enters the gas channel tube on the upper plate, then is collected into the top space of the cylinder through the air outlet holes on the distributor, and finally is discharged through the air outlet.
The heat source built-in falling film humidifier is characterized in that: the upper plate is in a disc structure; the nozzles are uniformly distributed in a ring shape, or uniformly distributed in a square shape, or uniformly distributed in a triangle shape, so that the gas-liquid two phases in the cylinder body are uniformly contacted.
The heat source built-in falling film humidifier is characterized in that: the liquid will form a certain liquid height between the distributor and the upper plate, and the gas channel pipe is required to extend out of the upper plate but is lower than the distributor in order to avoid the liquid from the liquid inlet and the liquid on the upper plate from blocking the steam channel.
The heat source built-in falling film humidifier is characterized in that: the liquid entering the cylinder body is sprayed onto the heat conducting wires from nozzles uniformly distributed on the upper plate to form a good liquid film, and the nozzles adopt convergent nozzles.
The heat source built-in falling film humidifier is characterized in that: the gas channel pipes are uniformly distributed in a circular shape, and the radial included angle formed by the gas channel pipes and the liquid inlet on the horizontal section is 30-45 degrees, so that liquid is prevented from entering the gas channel pipes to block the gas.
The heat source built-in falling film humidifier is characterized in that: the heat exchange tube spacing requirement is 2-4 times its diameter in order for the air to have sufficient heat exchange area and flow space between the tube bundles.
The heat source built-in falling film humidifier is characterized in that: the liquid outlet holes adopt a circular structure and are uniformly distributed in a circular shape so as to reduce resistance and uniformly discharge liquid collected from the outer wall of the heat exchange tube.
The invention has the beneficial effects that: the invention discloses a falling film humidifier with a built-in heat source, which has the advantages of simple and compact structure, high heat exchange efficiency, low pressure drop and simplified manufacturing process. After the liquid enters the humidifier, a good liquid film can be formed on the outer wall of the heat exchange tube, and the liquid can exchange heat with the hot fluid in the heat exchange tube effectively, and the temperature of the liquid continuously rises along with the falling of gravity, so that the liquid can perform efficient heat and mass transfer with air, and meanwhile, the flow resistance is reduced. The humidification is carried out in a heat source built-in mode, so that the heat can be fully absorbed by two-phase fluid, the heat exchange efficiency is improved, the equipment space is simplified, the energy consumption of a humidification system is reduced, and the method has great significance in energy conservation, emission reduction and industrial upgrading.
Drawings
FIG. 1 is a schematic three-dimensional structure of a proposed falling film humidifier with built-in heat source;
Fig. 2 is a front view of the proposed heat source built-in falling film humidifier;
FIG. 3 is a top view of the proposed heat source built-in falling film humidifier;
fig. 4 is a partial enlarged view of an upper portion of the humidifier;
Fig. 5 is a partial enlarged view of the lower portion of the humidifier.
Reference numerals in the figures: 1-a cylinder; a 2-distributor; 3-a liquid inlet; 4-upper plate; 5-a heat exchange tube; 6-air inlet; 7-a liquid outlet hole; 8-a collector; 9-a liquid outlet; 10-a bottom plate; 11-a heat source outlet; 12-nozzles; 13-a gas channel tube; 14-an air outlet hole; 15-an air outlet; 16-top plate; 17-Heat Source Inlet
Detailed description of the preferred embodiments
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to fig. 1, 2, 3, 4, and 5.
The specific implementation method of the invention comprises the following steps: firstly, the hot fluid enters the cavity of the distributor 2 through the heat source inlet 17 on the top plate 16, then uniformly enters the heat exchange tube 5, and the heat-exchanged hot fluid is collected in the collector 8 and finally discharged from the heat source outlet 11.
The low-temperature liquid enters between the distributor 2 and the upper plate 4 from the liquid inlet 3, is sprayed on the outer wall of the heat exchange tube 5 through the nozzle 12 to form a uniform liquid film, and is fully heat-exchanged with hot fluid in the heat exchange tube 5 along with the falling of the liquid film, the temperature is continuously increased, and finally is collected on the upper surface of the collector 8, enters the bottom of the cylinder 1 through the liquid outlet 7, and finally is discharged out of the cylinder 1 through the liquid outlet 9 on the bottom plate 10.
The low-temperature low-humidity air enters between the tube bundles consisting of a plurality of heat exchange tubes 5 through an air inlet 6 at the bottom of the cylinder body 1, the temperature and the humidity are continuously increased through heat and mass transfer with a liquid film in the air rising process, and finally the high-temperature high-humidity air firstly enters into a gas channel tube 13 on the upper plate 4, then is collected into the top space of the cylinder body 1 through an air outlet 14 on the distributor 2, and finally is discharged through an air outlet 15.
It is specifically noted that the equivalent scaling of the structure of the present invention is also within the scope of the present invention, and when the heat source built-in falling film humidifier provided by the present invention is implemented, the nozzle flow rate and the flow rate should be paid special attention, the film forming flow rate should be ensured, and the gas flow rate should be adjusted according to the liquid film flow rate, so as to realize efficient humidification.
Claims (6)
1. The utility model provides a built-in falling film humidifier of heat source, mainly includes barrel (1), and barrel (1) have bottom plate (10) and roof (16), its characterized in that:
a liquid outlet (9) is arranged at the center of the bottom plate (10), and a heat source inlet (17) is arranged at the center of the top plate (16); the wall surface of the upper part of the cylinder body (1) is respectively provided with an air outlet (15) and a plurality of symmetrical liquid inlets (3) from top to bottom; the wall surface of the lower part of the cylinder body (1) is respectively provided with a plurality of symmetrical air inlets (6) and a single heat source outlet (11) from top to bottom;
The inside of the cylinder body (1) is positioned between the top plate (16) and the bottom plate (10), and a distributor (2), an upper plate (4) and a collector (8) are sequentially arranged from top to bottom; wherein the distributor (2) is positioned between the air outlet (15) and the liquid inlet (3); wherein the upper plate (4) is positioned at the upper part of the cylinder body (1) and below the liquid inlet (3); wherein the collector (8) is located between the air inlet (6) and the heat source outlet (11); the upper plate (4) is distributed with a plurality of nozzles (12); the distributor (2) and the collector (8) are of a cavity structure; a plurality of heat exchange pipes (5) are arranged between the distributor (2) and the collector (8), the heat exchange pipes (5) are in one-to-one correspondence with the nozzles, and the heat exchange pipes (5) penetrate through the nozzles (12);
The upper top surface of the distributor (2) is communicated with a heat source inlet (17), and the lower bottom surface of the distributor (2) is communicated with the upper part of the heat exchange tube (5); the upper top surface of the collector (8) is communicated with the lower part of the heat exchange tube (5), and the lower bottom surface of the collector (8) is communicated with the heat source outlet (11); wherein a plurality of air outlet holes (14) are arranged around the heat exchange tube (5) on the distributor (2); a plurality of liquid outlet holes (7) are arranged around the heat exchange tube (5) on the collector (8); the upper plate (4) is also provided with a plurality of gas channel pipes (13), and the gas channel pipes (13) are in one-to-one correspondence with the gas outlet holes (14) on the distributor (2);
The upper plate (4) is in a disc structure; the nozzles (12) are uniformly distributed in a ring shape, or uniformly distributed in a square shape, or uniformly distributed in a triangle shape;
The nozzle (12) is a converging nozzle.
2. The heat source-built-in falling film humidifier according to claim 1, wherein:
The gas channel pipes (13) are uniformly distributed in a circular shape, and the radial included angle formed by the gas channel pipes and the liquid inlet (3) on the horizontal section is 30-45 degrees.
3. The heat source-built-in falling film humidifier according to claim 1, wherein: the upper plate (4) extends above the gas channel pipe (13) and is lower than the distributor (2).
4. The heat source-built-in falling film humidifier according to claim 1, wherein: the distance between the heat exchange tubes (5) is 2-4 times of the diameter of the heat exchange tubes.
5. The falling film humidifier with a built-in heat source according to claim 1, wherein: the liquid outlet holes (7) are of a round hole structure and are uniformly distributed in a round shape.
6. The method for operating a falling film humidifier with a built-in heat source according to claim 1, comprising the steps of:
Firstly, hot fluid enters a cavity of a distributor (2) through a heat source inlet (17) on a top plate (16), then uniformly enters a heat exchange tube (5), and the heat-exchanged hot fluid is collected into a collector (8) and finally discharged from a heat source outlet (11);
The low-temperature liquid enters between the distributor (2) and the upper plate (4) from the liquid inlet (3), is sprayed on the outer wall of the heat exchange tube (5) through the nozzle (12) to form a uniform liquid film, and is fully heat-exchanged with hot fluid in the heat exchange tube (5) along with the descending of the liquid film, the temperature is continuously increased, and finally, the low-temperature liquid is collected on the upper surface of the collector (8), enters the bottom of the cylinder (1) through the liquid outlet (7), and finally is discharged out of the cylinder (1) through the liquid outlet (9) on the bottom plate (10); the low-temperature low-humidity air enters between the tube bundles consisting of a plurality of heat exchange tubes (5) through an air inlet (6) at the bottom of the cylinder (1), in the air rising process, the temperature and the humidity are continuously increased through heat and mass transfer with a liquid film, and finally the high-temperature high-humidity air firstly enters into an air channel tube (13) on the upper plate (4) and then is collected into the top space of the cylinder (1) through an air outlet hole (14) on the distributor (2), and finally is discharged from an air outlet (15).
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| CN201911105432.8A CN110822604B (en) | 2019-11-13 | 2019-11-13 | Heat source built-in falling film humidifier and working method thereof |
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| CN201911105432.8A CN110822604B (en) | 2019-11-13 | 2019-11-13 | Heat source built-in falling film humidifier and working method thereof |
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| CN110822604B true CN110822604B (en) | 2024-11-26 |
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| CN211204320U (en) * | 2019-11-13 | 2020-08-07 | 南京航空航天大学 | Built-in heat source falling film humidifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3434049B2 (en) * | 1994-01-20 | 2003-08-04 | 三菱重工業株式会社 | Water absorption heating humidifier |
| US6850698B1 (en) * | 2003-09-21 | 2005-02-01 | Edward Hua Seng Goh | Humidifier for use with source of heated air |
| JP5446840B2 (en) * | 2009-12-24 | 2014-03-19 | 株式会社デンソー | Humidifier |
| US8894046B2 (en) * | 2011-07-20 | 2014-11-25 | Fka Distributing Co., Llc | Humidifier having an anti-contamination system |
| KR101496651B1 (en) * | 2013-05-20 | 2015-03-02 | 최재구 | Heating type humidifier having porous ceramic |
| WO2015116362A1 (en) * | 2014-01-09 | 2015-08-06 | University Of Florida Research Foundation, Inc. | Open absorption cycle for dehumidification, water heating, and evaporative cooling |
| CN205783691U (en) * | 2016-05-26 | 2016-12-07 | 北京康孚科技股份有限公司 | The gas-liquid contact type full-heat-exchange equipment of built-in Cooling and Heat Source |
| CN105890147B (en) * | 2016-06-28 | 2019-02-01 | 北京康孚科技股份有限公司 | A gas-liquid total heat exchange device with built-in cold and heat source based on metal fiber filler |
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| CN211204320U (en) * | 2019-11-13 | 2020-08-07 | 南京航空航天大学 | Built-in heat source falling film humidifier |
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