CN211903370U - Shell-and-tube evaporator with liquid separating device - Google Patents
Shell-and-tube evaporator with liquid separating device Download PDFInfo
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- CN211903370U CN211903370U CN201922279628.0U CN201922279628U CN211903370U CN 211903370 U CN211903370 U CN 211903370U CN 201922279628 U CN201922279628 U CN 201922279628U CN 211903370 U CN211903370 U CN 211903370U
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Abstract
The utility model discloses a shell and tube evaporator with divide liquid device, it includes casing, heat exchange tube, flow equalizing plate, refrigerant feed liquor pipe, outlet pipe, shell side entry, shell side export, tube sheet and divides the liquid device, divide the liquid device to include: an inlet distributor and a flow equalizing plate. The inlet distributor is connected with the tail end of the liquid inlet pipe and extends into the pipe box, and a rectangular sealing plate is mounted at the amplifying end of the trapezoidal bottom surface and provided with a round hole; the flow equalizing plate is arranged in the pipe box and is uniformly distributed with flow equalizing holes. The utility model discloses an entry distributor and the secondary of flow equalizing plate effect increase the interior fluidic flow resistance of evaporimeter, thereby make entry pipe case pressure everywhere reach balanced promotion entry pipe case inside pressure degree of consistency and vertical fluid homogeneity, make refrigerant fluid evenly distributed in each the heat exchange tube to evaporate completely in the heat exchange tube and be gaseous, improve the heat transfer performance of evaporimeter, this shell and tube type evaporimeter design science, reliability are high, have wide application prospect.
Description
Technical Field
The utility model belongs to the technical field of the evaporimeter, specifically be a shell and tube type evaporimeter with divide liquid device.
Background
The shell-and-tube heat exchanger has the advantages of simple structure, safety, reliability, high heat transfer efficiency and the like, improves the energy efficiency ratio of the refrigeration air-conditioning equipment, and has great significance on sustainable development of energy sources. In a refrigeration system, a heat exchanger usually needs to adopt a multi-path parallel connection mode, and when a refrigerant with uniform gas-liquid mixture is distributed to each branch in equal quantity, the heat exchanger can be guaranteed to be efficiently utilized, so that the distribution of two-phase refrigerants, particularly liquid phase, has a crucial influence on the efficiency of the heat exchanger and the operation of the refrigeration system.
The prior shell-and-tube evaporator liquid separation has the following defects: a liquid separating device is absent in the tube box, the refrigerant in the branch tube with less liquid supply amount is quickly evaporated, the heat exchange area is not effectively utilized, and the unevaporated refrigerant exists at the outlet of the heat exchange tube with larger refrigerant flow, so that the performance of the refrigeration equipment is reduced, and even the air is sucked to carry liquid; the mode of connecting the capillary tube of the liquid separator with the evaporation tube bundle has the defects of complex structure, small number of branch pipes and high processing difficulty; the liquid separating device has a multi-needle opposite-end-entering structure and lacks a liquid separating design for a tube pass side-entering evaporator.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to above problem, the utility model aims at providing a reliability is high, simple process, have the shell and tube evaporator who divides the liquid device.
The technical scheme is as follows: for realizing the purpose of the utility model, the utility model adopts the technical proposal that: a shell-and-tube evaporator with a liquid separation device comprises an inlet channel box (11), an outlet channel box (12), a shell (13), a heat exchange tube bundle (14) and the liquid separation device arranged in the inlet channel box (11); the refrigerant liquid inlet pipe (1) is connected with a liquid separating device in the inlet pipe box (11), the refrigerant outlet pipe (4) is connected with the outlet pipe box (12), the heat exchange pipe bundle (14) is installed in the shell (13), a first pipe plate (5-1) and a second pipe plate (5-2) are installed at two ends of the shell (13), the first pipe plate (5-1) is connected with the inlet pipe box (11), the second pipe plate (5-2) is connected with the outlet pipe box (12), and two ends of the heat exchange pipe bundle (14) respectively penetrate through the first pipe plate (5-1) and the second pipe plate (5-2) to be communicated with the inlet pipe box (11) and the outlet pipe box (12).
Furthermore, a shell pass outlet (2) and a shell pass inlet (3) are respectively arranged on two sides of the shell (13).
Furthermore, divide liquid device including entry distributor (7) and flow equalizing plate (9), inside refrigerant feed liquor pipe (1) stretched into entry pipe case (11), its end linked to each other with entry distributor (7), the amplification end bottom surface of entry distributor (7) was rectangle shrouding (8) to be provided with the round hole on rectangle shrouding (8), flow equalizing plate (9) are located entry pipe case (11) inside, and it has flow equalizing hole (10) to distribute on it.
Further, the inlet tube box (11) and the outlet tube box (12) are respectively connected with the first tube plate (5-1) and the second tube plate (5-2) through screw holes (6) by using bolts or screws.
Further, the longitudinal section of the inlet distributor (7) is in a trapezoidal structure, preferably an isosceles trapezoid, and the upper end of the inlet distributor is connected with the inlet pipe box (11).
Furthermore, the flow equalizing holes (10) distributed on the flow equalizing plate (9) are equally spaced and/or the flow equalizing holes (10) are circular or polygonal in shape, and the flow equalizing plate (9) is in a sieve-shaped structure.
Further, the diameter of the flow equalizing plate (9) is equal to the inner diameter of the inlet pipe box (11), and the flow equalizing plate (9) is parallel to the pipe plate.
Furthermore, a secondary refrigerant fluid is arranged between the shell (13) and the heat exchange tube bundle (14), the refrigerant fluid is arranged in the inlet tube box (11), the heat exchange tube bundle (14) and the outlet tube box (12), and the secondary refrigerant fluid and the refrigerant fluid flow in a countercurrent mode.
Furthermore, heat exchange tubes in the heat exchange tube bundle (14) are distributed according to a regular triangle and are in a single tube pass, the heat exchange tubes are internally threaded tubes, and turbulent flow spiral protrusion ties are arranged on the inner walls of the tubes.
Furthermore, the inlet distributor (7) and the flow equalizing plate (9) are connected with the inlet pipe box (11) in a welding mode, and the heat exchange pipe bundle (14), the first pipe plate (5-1) and the second pipe plate (5-2) are connected with the shell (13) in a welding mode.
Has the advantages that: compared with the prior art, the technical scheme of the utility model following beneficial technological effect has:
(1) the utility model relates to a shell and tube evaporator with divide liquid device, divide the liquid device to include the entry distributor and flow the board equally. The cross section of the inlet distributor is isosceles trapezoid, the upper end of the inlet distributor is connected with the inlet pipe, a plurality of round holes are formed in a rectangular sealing plate at the lower end of the inlet pipe box, the distributor is arranged at the upper end of the inlet pipe box, high-speed refrigerant fluid at the inlet can be prevented from directly impacting the bottom end of the inlet pipe box, the refrigerant flow channel is widened due to the trapezoid structure, uniform round holes in the rectangular sealing plate enable the refrigerant to uniformly enter the evaporator pipe box, and the inlet effect of fluid working media.
(2) The flow equalizing plate is parallel to the tube plate and the diameter are equal to the inner diameter of the tube box and is of a sieve-shaped structure, the flow equalizing holes are uniformly distributed on the flow equalizing plate and are circular or polygonal in shape, the flow equalizing plate is installed at the front end of an inlet of the heat exchange tube bundle and can equalize the flow of the refrigerant fluid for the second time, so that the influences of uneven distribution of the longitudinal fluid and a flowing vortex area in the tube box are reduced, the fluid working medium can uniformly enter the heat exchange tube bundle, and the refrigerant liquid can leave the evaporator through an outlet pipe after being evaporated into gas by each heat exchange tube bundle.
(3) The sizes of the openings of the inlet distributor and the flow equalizing plate can be adjusted according to the design flow of the evaporator, for example, when the design flow is large, the diameter of the flow equalizing hole can be properly increased, the pressure drop and the flow disturbance of the fluid working medium are reduced, when the flow is small, the diameter of the flow equalizing hole can be properly reduced, the flow equalizing effect is ensured, meanwhile, the number of the openings can also be determined according to the actual condition of the evaporator, the pressure drop is improved to a certain extent, and the uniform distribution of the fluid working medium is realized to the greatest extent. The utility model discloses simple structure, the processing and the installation of being convenient for, it is with low costs, equipment transformation strong adaptability.
Drawings
Fig. 1 is a schematic front view of the present invention;
fig. 2 is a left side view schematic diagram of the inside of the tube box of the present invention;
FIG. 3 is a perspective view of the inlet equalizing device of the present invention;
the reference numbers in the figures illustrate: 1-refrigerant liquid inlet pipe, 2-shell pass outlet, 3-shell pass inlet, 4-refrigerant outlet pipe, 5-1-first pipe plate, 5-2-second pipe plate, 6-screw hole, 7-inlet distributor, 8-rectangular sealing plate, 9-flow equalizing plate, 10-flow equalizing hole, 11-inlet pipe box, 12-outlet pipe box, 13-shell and 14-heat exchange pipe bundle.
Detailed Description
The utility model discloses a shell and tube evaporator with divide liquid device through reducing the flow deviation in each heat exchange tube, makes fluid working medium evenly distributed, realizes the improvement of evaporimeter heat transfer performance. The technical solution is described and illustrated in full below with reference to the accompanying drawings of the present invention.
As shown in fig. 1, a shell-and-tube evaporator with a liquid separating device comprises a tube plate 5, an inlet tube box 11, an outlet tube box 12, a shell 13, a heat exchange tube 14 and a liquid separating device arranged in the inlet tube box 11, wherein the liquid separating device comprises an inlet distributor 7 and a flow equalizing plate 9, a refrigerant liquid inlet tube 1 is connected with the inlet tube box 11, a refrigerant outlet tube 4 is connected with the outlet tube box 12, and a shell side inlet 3 and a shell side outlet 2 are connected with the shell 13 and positioned at two sides of the shell 13; the first tube plate 5-1 and the second tube plate 5-2 are positioned at two ends of the shell 13, the first tube plate 5-1 is connected with the inlet tube box 11, and the second tube plate 5-2 is connected with the outlet tube box 12; the heat exchange tube bundle 14 is installed in the shell 13, and the upper end and the lower end of the heat exchange tube bundle 14 are respectively communicated with the inlet tube box 11 and the outlet tube box 12 through the first tube plate 5-1 and the second tube plate 5-2.
As shown in fig. 2 and 3, the refrigerant inlet tube 1 extends into the inlet channel box 11, the end of the refrigerant inlet tube is connected to the inlet distributor 7, the enlarged bottom of the inlet distributor 7 is a rectangular sealing plate 8, and the rectangular sealing plate 8 is provided with a circular hole; the flow equalizing plate 9 is positioned inside the inlet pipe box 11, flow equalizing holes 10 are uniformly distributed on the flow equalizing plate 9, the flow equalizing plate 9 is arranged between the inlet distributor 7 and the pipe plate 5, the inlet pipe box 11 and the outlet pipe box 12 are respectively connected with the first pipe plate 5-1 and the second pipe plate 5-2 through screw holes 6, and the connection mode can be freely set. The inlet distributor 7 has a trapezoidal longitudinal section, preferably an isosceles trapezoid, and is connected at its upper end to the inlet header 11.
The utility model provides a divide liquid device to install in the entry pipe case 11 of evaporimeter, the refrigerant fluid by feed liquor pipe 1 flow in perpendicularly and enter 7 back runners of distributor widen, need carry out the back of once flow equalizing through the round hole on its bottom surface rectangle shrouding 8, the refluence enters into the pipe case 11, can cut down or even eliminate fluidic entry effect, avoids the direct impact of high-speed fluid to the pipe case bottom surface.
And the liquid separating device also comprises a flow equalizing plate 9 with flow equalizing holes 10, the flow equalizing plate 9 covers the whole cross section in the inlet pipe box 11, and the refrigerant fluid flowing out of the inlet distributor 7 needs to pass through the flow equalizing holes 10 for secondary flow equalization and then is distributed to enter each heat exchange pipe 14. Because the flow area of the flow equalizing plate 9 is smaller than the total flow area of each heat exchange tube 14, the flow resistance of the fluid in the inlet tube box 11 is increased, so that the pressure in each part of the interior is balanced, the influence of longitudinal fluid distribution unevenness and a flow vortex area is reduced, and the fluid in each heat exchange tube 14 is uniformly distributed.
Further, refrigerant liquid phase fluid enters the evaporator through the liquid inlet pipe 1, is evaporated into refrigerant gas through heat exchange and then is discharged through the outlet pipe 4, secondary refrigerant fluid flows in from the shell pass inlet 3 and flows out from the shell pass outlet 2 after being subjected to heat exchange and temperature reduction, and the secondary refrigerant fluid in the evaporator and the refrigerant fluid flow in a countercurrent mode. Refrigerant fluid is distributed to each branch in equal quantity, so that the heat exchange area of the heat exchange tube bundle can be fully utilized, and the heat exchange performance of the evaporator is improved.
In the utility model, the size of the rectangular sealing plate 8 is 100mm multiplied by 40mm, the diameter of the round hole is 10mm, and the distance between the round holes is 10 mm; the diameter of the flow equalizing plate 9 is 200mm, the thickness is 2mm, the distance from the tube plate is 20mm, the diameter of the flow equalizing hole 10 is 6mm, and the hole distance is 10 mm. The specific size, the number of the openings and the installation position of the flow equalizing plate can be adjusted according to the actual situation of the evaporator.
The utility model provides an among the liquid separation device, the central axis of the equal perpendicular to entry pipe case 11 of entry distributor 7 and flow equalizing plate 9 keeps first tube sheet 5-1 and the laminating that is parallel to each other of entry pipe case 11 in the installation, keeps second tube sheet 5-2 and the laminating that is parallel to each other of export pipe case 12, is convenient for connect.
The utility model discloses in, feed liquor pipe 1, entry distributor 7 and flow equalization board 9 are connected through welding and entry pipe case 11, also can install inside pipe case through modes such as threaded connection.
Preferably, the number of the flow equalizing plates 9 may be provided in plural.
Preferably, the flow equalizing holes 10 may be circular, oval, polygonal, etc.
Preferably, each heat exchange tube 14 is an internal threaded tube, and a turbulence spiral protrusion link is installed on the inner wall of the tube, so that the flow mixing of fluid in the tube can be enhanced through forced turbulence, and the convection heat transfer performance of the heat exchange tube is improved.
The utility model discloses can be applicable to in the same direction as arranging, multiple bank of tubes forms such as staggered arrangement, also can use multiple tubular product such as tubular metal resonator, non-metallic pipe, according to the actual need of heat exchanger design, the structure of entry distributor, flow equalizing plate and pipe case does to set up to different shapes.
The utility model discloses a change methods such as trompil diameter, trompil quantity, trompil structure and promote the flow field homogeneity of entry pipe case, can carry out the design optimization of minute liquid device structure according to the operating mode condition of heat exchanger difference, when improving pressure drop and flow resistance to a certain extent, furthest realizes fluid working medium's evenly distributed, maneuverability is stronger, and the application is better.
The utility model discloses think about novelty, design simple and convenient, be convenient for make and install, the secondary flow equalizing effect through entry distributor and flow equalizing plate promotes the inside pressure degree of consistency and the fluid homogeneity of entry pipe case, effectively reduces the fluidic flow distribution difference in the heat exchanger tube bank, improves shell and tube evaporator's heat exchange efficiency.
Claims (10)
1. A shell-and-tube evaporator with a liquid separation device is characterized by comprising an inlet channel box (11), an outlet channel box (12), a shell (13), a heat exchange tube bundle (14) and the liquid separation device arranged in the inlet channel box (11); the refrigerant liquid inlet pipe (1) is connected with a liquid separating device in the inlet pipe box (11), the refrigerant outlet pipe (4) is connected with the outlet pipe box (12), the heat exchange pipe bundle (14) is installed in the shell (13), a first pipe plate (5-1) and a second pipe plate (5-2) are installed at two ends of the shell (13), the first pipe plate (5-1) is connected with the inlet pipe box (11), the second pipe plate (5-2) is connected with the outlet pipe box (12), and two ends of the heat exchange pipe bundle (14) respectively penetrate through the first pipe plate (5-1) and the second pipe plate (5-2) to be communicated with the inlet pipe box (11) and the outlet pipe box (12).
2. A shell and tube evaporator with a liquid separation device according to claim 1, characterized in that shell side outlet (2) and shell side inlet (3) are provided on both sides of shell (13), respectively.
3. A shell and tube evaporator with a liquid separation device as recited in claim 1 or 2, characterized in that the liquid separation device comprises an inlet distributor (7) and a flow equalizing plate (9), the refrigerant inlet pipe (1) extends into the inlet pipe box (11), the end of the refrigerant inlet pipe is connected with the inlet distributor (7), the bottom surface of the enlarged end of the inlet distributor (7) is a rectangular closing plate (8), and the rectangular closing plate (8) is provided with a circular hole, the flow equalizing plate (9) is positioned inside the inlet pipe box (11) and is distributed with flow equalizing holes (10).
4. A shell and tube evaporator with liquid separation device according to claim 1 or 2, characterized in that the inlet channel box (11) and the outlet channel box (12) are respectively connected with the first tube plate (5-1) and the second tube plate (5-2) through screw holes (6) by using bolts or screws.
5. A shell and tube evaporator with a device for distributing liquid according to claim 3, characterized in that the longitudinal section of said inlet distributor (7) is of trapezoidal configuration.
6. A shell and tube evaporator with a liquid separation device according to claim 3, characterized in that the flow equalizing holes (10) are distributed on the flow equalizing plate (9) at equal intervals and/or the flow equalizing holes (10) are circular or polygonal in shape.
7. A shell and tube evaporator with a liquid separation device according to claim 3, characterized in that the diameter of the flow equalizing plate (9) is equal to the inner diameter of the inlet channel box (11).
8. A shell and tube evaporator with a liquid separation device as recited in claim 1 wherein a coolant fluid is between said shell (13) and said heat exchange tube bundle (14), and a coolant fluid is in said inlet tube box (11), heat exchange tube bundle (14) and outlet tube box (12), said coolant fluid and said coolant fluid flowing in countercurrent.
9. A shell and tube evaporator with a liquid separation device as recited in claim 1 wherein the heat exchange tubes in said heat exchange tube bundle (14) are arranged in regular triangle and in single pass, the heat exchange tubes are internally threaded tubes, and the inner walls of the tubes are provided with turbulence spiral protrusion ties.
10. A shell and tube evaporator with a liquid separation device according to claim 3, characterized in that: the inlet distributor (7) and the flow equalizing plate (9) are connected with the inlet pipe box (11) in a welding mode, and the heat exchange pipe bundle (14), the first pipe plate (5-1) and the second pipe plate (5-2) are connected with the shell (13) in a welding mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922279628.0U CN211903370U (en) | 2019-12-18 | 2019-12-18 | Shell-and-tube evaporator with liquid separating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922279628.0U CN211903370U (en) | 2019-12-18 | 2019-12-18 | Shell-and-tube evaporator with liquid separating device |
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| CN211903370U true CN211903370U (en) | 2020-11-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023630A (en) * | 2019-12-18 | 2020-04-17 | 东南大学 | Shell-and-tube evaporator with liquid separating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023630A (en) * | 2019-12-18 | 2020-04-17 | 东南大学 | Shell-and-tube evaporator with liquid separating device |
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