CN210374184U - Falling film evaporator - Google Patents
Falling film evaporator Download PDFInfo
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- CN210374184U CN210374184U CN201921205516.4U CN201921205516U CN210374184U CN 210374184 U CN210374184 U CN 210374184U CN 201921205516 U CN201921205516 U CN 201921205516U CN 210374184 U CN210374184 U CN 210374184U
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Abstract
The utility model provides a falling film evaporator, including a barrel, predetermined quantity's inlet, predetermined quantity's gas outlet, predetermined quantity's heat exchange tube, predetermined quantity's branch liquid subassembly and predetermined quantity's equal liquid subassembly to and predetermined quantity's defoaming subassembly, each divide the liquid subassembly to set up respectively at each inlet, divide liquid subassembly and each between the heat exchange tube and every three rows be provided with an equal liquid subassembly between the heat exchange tube, realized the multilayer divide liquid many times between the heat exchange tube, guaranteed liquid medium evenly distributed on each heat exchange tube, liquid medium fully contacts with the heat exchange tube, and heat exchange efficiency is high; the defoaming assemblies are arranged on the gas outlets and two sides of the liquid homogenizing assemblies, so that multilayer separation and component separation between the gaseous medium and the liquid medium carried by the gaseous medium are realized, the gas-liquid separation efficiency and quality are ensured, the service performance of the equipment is enhanced, and the service life of the equipment is prolonged.
Description
Technical Field
The utility model relates to an evaporator especially relates to a falling film evaporator.
Background
The evaporator is used as a main heat exchange device in a refrigeration system and mainly comprises a flooded evaporator, a dry evaporator and a falling film evaporator, wherein the falling film evaporator is widely applied to environments with large refrigeration demand, such as chemical industry, petroleum industry and the like, due to the advantages of high heat exchange efficiency, low refrigerant charge amount and the like. The performance of the falling film evaporator mainly depends on two parts, namely, the uniformity of liquid distribution of the refrigerant distributed to the surface of the evaporation tube after passing through the liquid distributor and the completeness of a formed liquid film; the second is the liquid entrainment in the gas after the refrigerant is evaporated and the phenomenon of air suction and liquid entrainment. The falling film evaporator with uniform liquid distribution and less liquid suction is very necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a falling film evaporator with uniform liquid distribution, less air suction and good performance.
In order to achieve the above object, the falling film evaporator provided by the present invention comprises a cylinder and a predetermined number of liquid inlets arranged on the top of the cylinder, wherein the distribution direction of the predetermined number of liquid inlets is consistent with the length direction of the cylinder; the gas outlets are uniformly arranged on two side surfaces of the cylinder body close to the liquid inlet; the heat exchange tubes are arranged in the cylinder body and are arranged in a corner regular triangle, and gaps are reserved among every three rows of heat exchange tubes; the liquid distribution components are arranged at the liquid inlet, and the liquid equalizing components are arranged between the liquid distribution components and the heat exchange tubes and at the gaps of the heat exchange tubes; and the defoaming assemblies are respectively arranged at the gas outlets and used for gas-liquid separation.
Preferably, each liquid distribution assembly comprises a liquid distribution pipe connected with each liquid inlet and a spray header correspondingly connected with each liquid distribution pipe, each liquid distribution assembly comprises a first-stage pore plate, a second-stage pore plate and a third-stage pore plate, the pore diameters of orifices in the first-stage pore plate, the second-stage pore plate and the third-stage pore plate are gradually decreased, and a first water blocking ring is arranged on one surface, far away from the second-stage pore plate, of the first-stage pore plate and used for preventing the liquid from flowing out of the periphery of the first-stage pore plate.
Further preferably, each liquid distribution assembly comprises a liquid distribution main pipe connected with the liquid inlet, liquid distribution branch pipes symmetrically and uniformly distributed on two sides of the liquid distribution main pipe in a predetermined number, and a liquid distribution disc arranged below each liquid distribution branch pipe, liquid distribution holes are formed in the bottom of each liquid distribution branch pipe and the bottom of each liquid distribution disc, a second water blocking ring and liquid separation plates in a predetermined number are uniformly arranged on each liquid distribution disc in a parallel mode, the height of each second water blocking ring is higher than that of each liquid separation plate, and the heights of the liquid separation plates are consistent.
Preferably, the liquid distributing holes arranged on the liquid distributing main pipe correspond to the liquid distributing branch pipes, and the liquid distributing branch pipes are not arranged at the positions, corresponding to the liquid inlet pipes, of the liquid distributing main pipe.
Further preferably, the falling film evaporator further comprises a predetermined number of defoaming assemblies arranged on two sides of each liquid homogenizing assembly, one end of each defoaming assembly arranged on two sides of each liquid homogenizing assembly is correspondingly connected with each liquid homogenizing assembly, and the other end of each defoaming assembly arranged on two sides of each liquid homogenizing assembly is connected with the cylinder.
Further preferably, each defoaming assembly comprises three filter screens, each filter screen is provided with micropores only allowing gaseous medium to pass through, and the density of the micropores on each filter screen decreases from top to bottom in sequence.
Preferably, each air outlet is further provided with a baffle plate, the baffle plate is arranged between the air outlet and the corresponding defoaming component, and the baffle plate is provided with an air outlet.
Further preferably, a filtering device is correspondingly arranged between each liquid inlet and each liquid separating assembly.
Preferably, the falling film evaporator further comprises two end covers respectively arranged at two ends of the cylinder, and one of the end covers is provided with a water inlet and a water outlet.
The utility model has the advantages that: the utility model provides a falling film evaporator, which adopts the structural design of a plurality of liquid medium inlets, so that the liquid medium is more uniformly distributed, and the heat exchange efficiency is improved; the design of a plurality of gaseous medium outlets is adopted, so that the gaseous medium flows more balanced and reasonable, and overflows from each air outlet more quickly, and the heat exchange efficiency is indirectly improved;
a liquid homogenizing assembly is arranged between the liquid separating assembly and the heat exchange tubes of the falling film evaporator and between every two layers of heat exchange tubes, so that multiple liquid separation among multiple layers of heat exchange tubes is realized, the uniform distribution of a liquid medium on each heat exchange tube is ensured, the liquid medium is fully contacted with the heat exchange tubes, and the heat exchange efficiency is improved;
the defoaming assemblies are arranged on the gas outlets and two sides of the liquid homogenizing assembly of the falling film evaporator, so that multi-layer separation and component separation between the gaseous medium and the liquid medium carried by the gaseous medium are realized, the gas-liquid separation efficiency and quality are improved, the liquid medium is prevented from being carried in the gaseous medium discharged from the gas outlets, the service performance of equipment is enhanced, and the service life of the equipment is prolonged.
The filtering devices are correspondingly arranged between the gas outlets and the liquid separating assemblies of the falling film evaporator and are used for filtering the liquid medium entering the liquid separating assemblies, so that impurities are prevented from entering the falling film evaporator, local impact force generated when the liquid medium enters the liquid separating assemblies can be relieved, the liquid medium can be dispersed to a certain degree, and uniform distribution of the liquid medium is promoted.
Drawings
Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional structure diagram provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a liquid homogenizing assembly provided in embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a defoaming assembly provided in embodiment 1 of the present invention;
fig. 5 is a schematic cross-sectional structure provided in embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a liquid separation assembly provided in embodiment 2 of the present invention.
Detailed Description
The embodiments described below are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a falling film evaporator, which includes a barrel 1, and further includes a predetermined number of liquid inlets 2, a predetermined number of gas outlets 3, a predetermined number of heat exchange tubes 4, a predetermined number of liquid dividing assemblies 5, a predetermined number of liquid homogenizing assemblies 6, and a predetermined number of defoaming assemblies 7.
The liquid inlets 2 with a preset number are arranged at the top of the cylinder body 1 and are used as liquid medium inlets, the distribution direction of each liquid inlet 2 is consistent with the length direction of the cylinder body 1, and the structural design of a plurality of liquid medium inlets is adopted, so that liquid medium does not need to enter the cylinder body 1 from one liquid inlet 2, and the liquid medium can be distributed more uniformly; each air outlet 3 is arranged on the cylinder 1 and is used as a gaseous medium outlet, each air outlet 3 is arranged on two sides of the surface where the central connecting line of each liquid inlet 2 is positioned, each air outlet can be symmetrically arranged on the surface where the central connecting line of each liquid inlet 2 is positioned, and can also be arranged according to actual needs, and the structural design of a plurality of gaseous medium outlets is adopted, so that the flow of the gaseous medium is more balanced and reasonable; the heat exchange tubes 4 are arranged in the cylinder 1 and are arranged in a corner regular triangle, and gaps are reserved among every three rows of heat exchange tubes 4.
Each liquid distribution component 5 is connected with each liquid inlet 2, and a filtering device 8 is correspondingly arranged between each liquid inlet 2 and each liquid distribution component 5 and used for filtering the liquid medium entering the liquid distribution component 5, preventing impurities from entering the falling film evaporator, simultaneously slowing down the local impact force of the liquid medium entering the liquid distribution component 5 and dispersing the liquid medium to a certain degree, and promoting the uniform distribution of the liquid medium. Each liquid distributing assembly 5 comprises a liquid distributing pipe 51 connected with each liquid inlet 2 and a spray head 52 correspondingly connected with each liquid distributing pipe 51.
Referring to fig. 1, 2 and 3, each liquid equalizing assembly 6 is respectively disposed between the heat exchange tubes 4 and the liquid dividing assembly 5 and at the gap between every two layers of the heat exchange tubes 4, each liquid equalizing assembly 6 includes a first-stage orifice plate 61, a second-stage orifice plate 62 disposed below the first-stage orifice plate 61, and a third-stage orifice plate 63 disposed below the second-stage orifice plate 62, the diameters of orifices 64 on the first-stage orifice plate 61, the second-stage orifice plate 62 and the third-stage orifice plate 63 are sequentially decreased, and a first water blocking ring 65 is disposed on one surface of the first-stage orifice plate 61 away from the second-stage orifice plate 62 and used for preventing the liquid from flowing out from the periphery of the first-stage orifice plate 61. Liquid medium enters the liquid distribution assembly 5 through the filtering device 8 and then is sprayed to the liquid equalizing assembly 6, the liquid medium passes through the first-stage pore plate 61, the second-stage pore plate 62 and the third-stage pore plate 63 and is uniformly distributed on the heat exchange tubes 4, the liquid medium passes through the heat exchange tubes 4 layer by layer and then is non-uniformly distributed on each layer of heat exchange tubes 4, the liquid equalizing assembly 6 is arranged among every three layers of heat exchange tubes 4, the liquid distribution uniformity of the liquid medium distributed on the surfaces of the heat exchange tubes 4 and the completeness of a formed liquid film can be greatly improved, and the heat exchange efficiency is improved.
Referring to fig. 2 and 4, each of the defoaming assemblies 7 is respectively disposed at each of the gas outlets 3 and at both sides of each of the liquid equalizing assemblies 6, one end of each of the defoaming assemblies 7 disposed at both sides of each of the liquid equalizing assemblies 6 is correspondingly connected to each of the liquid equalizing assemblies 6, and the other end is connected to the cylinder 1 for gas-liquid separation, each of the defoaming assemblies 7 includes three filter screens 71, each of the three filter screens 71 is provided with a micro-hole 711 for allowing only a gaseous medium to pass through, and the density of the micro-holes 711 on each of the three filter screens 71 decreases from top to bottom in sequence, so as to conform to a gas flow law, and separate and filter the liquid medium in the gaseous medium step by step, thereby improving a separation effect. After the relatively cold liquid medium absorbs the heat of the high-temperature medium in the heat exchange tube 4, part of the liquid medium is changed into a gaseous medium, the gaseous medium escapes from the liquid medium and can entrain a small amount of the liquid medium, when the gaseous medium passes through each defoaming component 7, the micropores 711 on each filter screen 71 only allow the gaseous medium to pass through, and through the layer-by-layer separation of the defoaming components 7 arranged on both sides of each liquid homogenizing component 6 and each gas outlet 3, the effect equivalent to the superposition of the effect of the single defoaming component is realized, the gas-liquid separation efficiency and the effect are improved, the gas-liquid mixture can be effectively separated, the liquid medium entrained in the gaseous medium is prevented from passing through, and the damage of the liquid medium to the compressor is avoided. Each gas outlet 3 is further provided with a baffle 9, the baffle 9 is positioned above the defoaming component 7 arranged on the gas outlet 3, the baffle 9 is provided with a predetermined number of gas outlet holes 91, and the baffle 9 is used for slowing down the flow velocity of the gaseous medium.
The falling film evaporator further comprises two end covers 10 respectively arranged at two ends of the barrel body 1, a water inlet 101 and a water outlet 102 are arranged on one end cover 10, the water inlet 101 and the water outlet 102 are respectively connected with two ends of each heat exchange tube 4, and the water inlet 101 and the water outlet 102 are respectively used for the inflow and outflow of high-temperature media.
The falling film evaporator provided by the embodiment has the working principle that: liquid medium enters the liquid distribution assembly 5 from the liquid inlet 2, enters the liquid equalizing assembly 6 after primary liquid distribution of the liquid distribution assembly 5, uniformly and equivalently sprinkles the liquid medium to the heat exchange tubes 4 after secondary liquid distribution of the liquid equalizing assembly 6, the liquid medium exchanges heat with high-temperature medium in the heat exchange tubes 4 and absorbs heat to become gaseous medium, the liquid medium carried in the gaseous medium is separated and blocked through layer-by-layer blocking and gas-liquid separation of the foam removing assemblies 7, and the gaseous medium flows out from the gas outlet 3.
The falling film evaporator provided by the embodiment adopts a structural design of a plurality of liquid medium inlets, so that the liquid medium is distributed more uniformly, and the heat exchange efficiency is improved; the design of a plurality of gaseous medium outlets is adopted, so that the gaseous medium flows more balanced and reasonable, and overflows from each air outlet 3 more quickly, and the heat exchange efficiency is indirectly improved; a liquid equalizing component 6 is arranged between the liquid dividing component 5 and the heat exchange tubes 4 and between every three layers of heat exchange tubes 4, so that multiple liquid dividing among multiple layers of heat exchange tubes 4 is realized, the uniform distribution of a liquid medium on each heat exchange tube 4 is ensured, the liquid medium is fully contacted with the heat exchange tubes 4, and the heat exchange efficiency is improved; each gas outlet 3 reaches each it all is provided with to all liquid subassembly 6 both sides defoaming subassembly 7 has realized the multilayer separation and the weight separation between gaseous medium and the liquid medium that smugglies secretly, has improved gas-liquid separation efficiency and quality, has guaranteed to follow do not smuggly liquid medium in the gaseous medium of gas outlet 3 exhaust, has strengthened equipment performance, has prolonged equipment life.
Example 2
Referring to fig. 5 and 6, the present embodiment provides a falling film evaporator, which is different from the falling film evaporator provided in embodiment 1, in that each liquid distribution assembly 5a includes a liquid inlet pipe 51a correspondingly connected to each liquid inlet 2a, a liquid distribution main pipe 52a correspondingly connected to each liquid inlet pipe 51a, a predetermined number of liquid distribution branch pipes 53a symmetrically and uniformly distributed on both sides of the liquid distribution main pipe 52a, and a liquid distribution tray 54a disposed below each liquid distribution branch pipe 53a, the liquid distribution main pipe 52a is disposed between the liquid distribution trays 54a and perpendicular to the liquid inlet pipe 51a, both ends of the liquid distribution main pipe 52a and each liquid distribution branch pipe 53a are disposed in a closed manner, a predetermined number of air outlet holes 521a are disposed on the upper portion of the liquid distribution main pipe 52a for discharging air in the liquid distribution main pipe 52a, a predetermined number of liquid distribution holes 55a are uniformly disposed on the bottoms of the liquid distribution branch pipes 53a and the liquid distribution tray 54a, the liquid distribution disc 54a is provided with a second water blocking ring 541a and a predetermined number of liquid barriers 542a which are parallel to each other and are uniformly arranged, each liquid barrier 542a divides the liquid distribution disc 54a into a plurality of compartments with equal volumes, so as to promote uniform distribution of liquid media, the height of the second water blocking ring 541a is higher than that of each liquid barrier 542a, each liquid barrier 542a is uniform in height, liquid media in each liquid distribution branch pipe 53a can directly enter the corresponding compartment on the liquid distribution disc 54a, and when too much liquid media exist in a certain compartment, the liquid media can overflow the barrier flow 542a to other compartments, so that the volume of the liquid media in each compartment is as uniform as possible, and then the liquid media are uniformly sprayed onto the heat exchange tubes 4a through the liquid distribution holes 55a uniformly distributed at the bottom of the liquid distribution disc 54 a. The liquid distributing holes 55a formed in the liquid distributing main pipe 52a correspond to the liquid distributing branch pipes 5, the liquid distributing branch pipes 53a are not arranged at the positions, corresponding to the liquid inlet pipes 51a, of the liquid distributing main pipe 52a, liquid media enter the liquid distributing main pipe 52a from the liquid inlet pipes 51a, local impact force exists, and if the liquid distributing main pipe 52a corresponds to the liquid inlet pipes 51a, the liquid distributing branch pipes 53a are arranged at the positions, corresponding to the liquid distributing holes 55a, of the liquid media, most of the liquid media enter the corresponding liquid distributing branch pipes 53a from the liquid distributing holes 55a corresponding to the liquid inlet pipes 51a, and uneven distribution of the liquid media can be indirectly caused.
The falling film evaporator provided by the embodiment has the same working principle and the same beneficial effects and advantages as the falling film evaporator provided by the embodiment 1 except that the falling film evaporator provided by the embodiment 1 has the difference.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A falling film evaporator comprising a shell, wherein the falling film evaporator further comprises:
the liquid inlets are arranged at the top of the cylinder body, and the distribution direction of the liquid inlets in a preset number is consistent with the length direction of the cylinder body;
the gas outlets are uniformly arranged on two side surfaces of the cylinder body close to the liquid inlet;
the heat exchange tubes are arranged in the cylinder body and are arranged in a corner regular triangle, and gaps are reserved among every three rows of heat exchange tubes;
the liquid distribution components are arranged at the liquid inlet, and the liquid equalizing components are arranged between the liquid distribution components and the heat exchange tubes and at the gaps between the heat exchange tubes;
and the defoaming assemblies are respectively arranged at the gas outlets and used for gas-liquid separation.
2. The falling film evaporator according to claim 1, wherein each of said liquid homogenizing assemblies comprises a first stage orifice plate, a second stage orifice plate and a third stage orifice plate sequentially disposed below said first stage orifice plate, a predetermined number of orifices are disposed on said first stage orifice plate, said second stage orifice plate and said third stage orifice plate, the diameters of said orifices on said first stage orifice plate, said second stage orifice plate and said third stage orifice plate are sequentially decreased, and a first water blocking ring is disposed on a surface of said first stage orifice plate away from said second stage orifice plate for preventing the outflow of the liquid around said first stage orifice plate.
3. The falling film evaporator according to claim 1, wherein each liquid distribution assembly comprises a liquid distribution pipe correspondingly connected with each liquid inlet and a spray header correspondingly connected with each liquid distribution pipe.
4. The falling film evaporator according to claim 1, wherein each liquid distribution assembly comprises a liquid inlet pipe connected to the liquid inlet, a liquid distribution header pipe connected to the liquid inlet pipe, a predetermined number of liquid distribution branch pipes symmetrically and uniformly distributed on both sides of the liquid distribution header pipe, and a liquid distribution tray disposed below each liquid distribution branch pipe, wherein liquid distribution holes are disposed at the bottoms of the liquid distribution branch pipes and the liquid distribution tray, a second water blocking ring and a predetermined number of liquid separation plates are disposed on the liquid distribution tray, the liquid separation plates are parallel to each other and uniformly disposed, the height of the second water blocking ring is higher than that of each liquid separation plate, and the heights of the liquid separation plates are the same.
5. The falling film evaporator according to claim 4, wherein the liquid separating holes provided in the liquid separating main pipe correspond to the liquid separating branch pipes, and the liquid separating main pipe does not have the liquid separating branch pipes provided at positions corresponding to the liquid inlet pipes.
6. The falling film evaporator according to claim 1, further comprising a predetermined number of said defoaming assemblies disposed on both sides of each of said homogenizing assemblies, wherein each of said defoaming assemblies disposed on both sides of each of said homogenizing assemblies is connected at one end thereof to each of said homogenizing assemblies and at the other end thereof to said barrel.
7. The falling film evaporator according to claim 6, wherein each of said defoaming assemblies comprises three filter screens, said three filter screens having micro-holes for allowing only gaseous medium to pass through, and the density of said micro-holes on said three filter screens decreases from top to bottom.
8. The falling film evaporator according to claim 1, wherein each gas outlet is further provided with a baffle plate, the baffle plate is arranged between the gas outlet and the corresponding defoaming assembly, and the baffle plate is provided with gas outlet holes.
9. The falling film evaporator according to claim 1, wherein a filtering device is disposed between each liquid inlet and each liquid separating assembly.
10. The falling film evaporator according to claim 1, further comprising end caps disposed at each end of said barrel, one of said end caps having a water inlet and a water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205516.4U CN210374184U (en) | 2019-07-29 | 2019-07-29 | Falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205516.4U CN210374184U (en) | 2019-07-29 | 2019-07-29 | Falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210374184U true CN210374184U (en) | 2020-04-21 |
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ID=70247270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921205516.4U Active CN210374184U (en) | 2019-07-29 | 2019-07-29 | Falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210374184U (en) |
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2019
- 2019-07-29 CN CN201921205516.4U patent/CN210374184U/en active Active
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