JPS5878096A - Gas liquid dispersing device of plate fin type heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat transfer efficiency, in the device in the titled device for an air separating device and the like, by arranging a gas liquid dispersing core comprising a gas liquid joining layer and a flow path layer in the header of the heat exchanger, separately flowing the gas and the liquid into the joining layer, and joing them in the joining layer. CONSTITUTION:The liquid is supplied from an inlet port 42 and flows into straight fins 23 of distributing fins 22 through the header 26 and joining fins 29. The gas enters a communicating dome 40 from an inlet port 41, and flows into a flow path layer 31 through a flow hole 39. The gas is diffused into the width direction, and flows into a joining layer 30 from a through hole 37. The gas and the liquid are joined here and two phase stream of the gas and the liquid is formed. The stream is sent to effective fins 21 through the distributing fins 22. In this constitution, the gas and liquid are supplied in a single phase to the inlet part of the heat exchanger, and simultaneously joined in a dispersing core 27. The gas and liquid are uniformly dispersed in the flow path. Therefore the heat transfer efficiency of the effective fins can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate-fin heat exchanger IIO air flow exchange system that takes the air two-phase system and which is used in air separation M devices, ethylene plants, etc. O For example, in an ethylene plant where liquid (methane) and gas (hydrogen gas) are heated as a two-phase flow, heat exchange! I! If the ratio of gas and liquid in the vessel varies depending on the location, it will be possible to obtain a homogeneous reaction, thereby reducing the drop in production efficiency, and in the case of abrasiveness, single #AR will occur and overheating will occur. There is a partition [11 minutes is damaged etc. 0 @ Zhao.

From this point of view, an improvement has been made in the past in which the gas phase and IIILs are uniformly distributed (dispersed) in the direction of the koji fins.

In the example shown in Figure 1, a porous dispersion I [(2) is provided in the header (1) which is the fluid supply part to the heat exchanger, and the gas and liquid are heated through the supply port (3). The combined shape is used to supply the header (inside υ), where the dispersion plate (2) acts as a resistance to the flow of fluid.
It diffuses in the direction of the heat exchanger shown by, and then KA combination II
L Hiro, transmits the dispersion plate (ri), and further straight fins (5
) and distribution fins (6) into the effective twin (7), where it is heated. In this way, the porous dispersion plate (2) [the ridges used have the advantage of a simple structure, but the distribution ridges
There is a problem with IA susceptibility, and there is also the drawback of not being able to grasp whether dispersion is taking place or being distorted.
If the two-phase flow flows from the top to the bottom of the heat exchanger 6, the gas and liquid will partially condense within the header, making it impossible to achieve accurate dispersion.

In addition, in the case shown in No. 2-, the body is supplied to the 9 Supervibe 4, which is arranged in one direction inside the heat exchanger, and the nozzle hole (((
(support), L9)% ”・Y) injected liquid and sequential inlet (
(to) distribution fin at - accidentally supplied round gas,
It meets sb at the bottom of the supervibe (6), closes the straight fin, and flows into the effective fin. However, in this case, since the accurate hole drilling in the Supervibe (older model) is very steep, good distribution of accumulation cannot be obtained, and the Supervibe acts as a resistance to the flow path, which not only reduces the flow rate. The fins are cut off in the part where the Super Vibe is applied, so you can't apply pressure to this part.

This is because the fin itself serves as a reinforcing element that connects the plates.

Furthermore, heat exchanger 41 (see U.S. CI + Patent No. 3,559,722) is known, in which holes are made in the plates that partition the fluid passages that form WI4 folds to mix air and tlL inside the core. In exchange 4, the plate size is large, and it is extremely difficult to drill such a hole in the middle, and the precision of the hole cannot be obtained, so it is difficult to achieve a positive dispersion and is not practical. i0 Therefore, the purpose of the present invention 0g is,
The goal is to improve the heat transfer coefficient by distributing gas and liquid at a waterfall up to the inlet of the heat exchanger, and dispersing the gas and liquid accurately in the porthole, and it is manufactured with a simple structure. Shinakasuku,
To provide a gas-liquid dispersion device for a flat rate fin heat exchanger that is excellent in strength.A) Heat exchange@1) A gas-liquid contact layer heat exchanger with a gas-liquid dispersion core provided in the header. In the gas-liquid dispersion device used, the core is connected to and separated by a gas-liquid convergence layer and a plate provided with a through hole.
#-Flow The premixed flow layer is alternately stacked on the flow path #1iii, and the premixed flow layer is communicated with the effective fins in the heat exchanger and the space inside the header, while the flow path layer is communicated with the outside of the header, and the flow path layer is communicated with the header. A hand beast is provided to cause the body to flow into the space inside the header and the ILA road layer from the outside,
4) Provide a plate-fin heat exchanger *@O gas-liquid dispersion device characterized in that the fluid is mixed in contact with the mixed flow layer and flows into the effective fins in the heat exchanger. It is something to do.

゛ Refer to the diagram with 0@ below ゛ -t-t-
I will give a detailed explanation of the Marujozen example.

Here, Wc No. 3 is the gas-liquid component gI, which is an example of the main angle.
! A perspective view of the heat exchanger enriched with L#1II11 from below - Figure 1#84 is a plan cross-sectional view of the gas-liquid splitting device seen from below.
-A cross-sectional view and a B-B cross-sectional view.

In these -, (to) is a plate-fin type heat exchanger, which is an effective fin type heat exchanger that performs the actual heat transfer, and which is used to introduce gas, liquid, heat medium, and other fluids into the heat exchanger. It consists of distribution fins, which are part of the gas-liquid inlet.

The distribution fin (2) includes a straight fin (to) that takes in a gas-liquid two-phase flow, a straight fin collar and an effective fin (
2), two-phase flow distribution fins consisting of inclined fins (towards) connecting the two, and heat medium distribution fins (not shown) for distributing the heat medium to the effective fins, etc., are alternately installed.

On the bottom surface (2) of such a distribution fin 1, there is a header (II!) for introducing liquid (or gas) into the heat exchanger fs- to generate a two-phase flow. A straight fin (2) is attached to the header (2), and a 90% flexible core (support) is attached to the header (2). As shown in Figs. 3 and 4, this branching puer (2) connects the space within the header (to) (shown in Fig. 5) and the effective fin (2) with straight fins (2) and inclined fins. A gas-liquid convergence layer (to) having a confluence fin (to) that communicates via a fin (to), and a flow path (2) which is a passage for gas (or liquid))
A partition 411. It is constructed by sandwiching the (to) and laminating them alternately, and the left, right, front and rear l
ll1ET is overridden by side grade -1 (to), country, (to). However, in the example shown in the figure,
Die i-fins (to), (to), . . . are laminated at the same time.

The above-mentioned gas-liquid convergence layer (to) and flow channel layer (to) are the partition plates (
The passage layer (2) is connected to the hole surface, surface, etc. of the a pattern drilled in the hole (to), and the passage layer (2) is attached to the nine side par 1. It is separated from the space (to) in the header (to) by 11jl. The side plate (end) that covers the side of the queen furrow core (goods) has l!
11. The flow holes (to), (to), etc. of 4111IL that communicate with the I11 road layer (2) are generally connected to this tI
The internal space of the late dome attached to the night plate, which covers all the L fan holes (to), -1...
It communicates with the outside world through an inlet loop, which is a set of intake ports attached to the communication dome.Next, the flow of fluid in the above-mentioned actual example will be explained. Entrance Vibe - Remove liquid from Entrance Vibe Co., Ltd.
The case of supplying fresh gas will be described below. The liquid supplied to the header of the artificial vibrator flows into the straight fin of the distribution fin through the merging fin (2) communicating with the inside of the header. Also, from the artificial vibe +411, the 9 gas holes enter the communication dome, and the communication hole that communicates with the inside of the communication dome (to), 1... goes through the warehouse and enters the all road layer (2), and the flow channel layer. The mosquitoes spread widely in the width direction, and the large passage hole - 1 side is placed in the width direction of the flow channel layer.
Passing through the mountain pass, the human body and liquid merge into the gas-liquid convergence layer to form a gas-liquid two-phase flow, which is sent to the effective fin ■rc via the distribution fin @.

In the above example, the heat exchanger part is converted into a gas-liquid two-phase tt-
However, depending on the requirements on the I&needle, a dividing core may be provided in a part of the heat exchanger to supply a two-phase wave. However, when the two-phase wave is supplied from the bottom of the heat exchanger as in the case of Kamikii-ga, it is preferable that the round twin has perforated fins, and the supply from the @ part of the heat exchanger is desirable. In such cases, it is preferable to use straight fins without holes.
The dispersion core on the east side may be installed at the top of the heat exchanger to make the two-phase flow downward, but in this case, the gas should be supplied from the header side and the liquid should be supplied from between the continuous domes. is desirable.

As described above, the present invention is a gas-liquid dispersion device for use in a heat exchanger of a gas-liquid contact, in which a gas-liquid dispersion core is provided in the header of a heat exchanger, and the core is a gas-liquid converged layer. and nine IL passage layers which are communicated and partitioned by a plate provided with a through hole and the confluence layer are alternately laminated. On the other hand, the flow passage layer is communicated with the outside of the header, and the header is further provided with means for separately introducing a fluid t' into the header inner space and the flow passage layer (from the outside), so that each fluid is connected to the premixed flow. Since this is a gas-liquid dispersion device for a plate fin heat exchanger, the inlet of the heat exchanger The gas and liquid are each supplied in a single phase until the end of the rounding and two-phase RK, where they join together in the dispersion pool and uniformly diffuse the gas or liquid in the flow channel layer. OII: A more accurate dispersion is obtained, and the heat transfer rate of the effective fin portion is improved. Also, the dispersion core is replaced with the conventional plate twist YMM! Since the 01111 structure can be used as is with only a circle with some changes, the manufacturing price will not be increased, and the fluid 0flt1.
Since no main member is used which would cause resistance to heat exchangers, zero brazing of the heat exchanger provides good adhesion, reduces pressure loss and is economical, and there is no risk of the strength of the heat exchanger itself decreasing.

j! Four dispersion cores can be attached to either the upper or lower part of the heat exchanger, so it can be applied to both upward current flow and downward current flow.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of a conventional WLO, and the 1ms diagram is a perspective view of a heat exchanger including a gas-liquid dispersion device, which is an embodiment of the present invention, from below. Figure 4 shows the open-air liquid dispersion device, a preliminary sectional view from below O, Figure 815, and l.
I46 Zusha, A-A arrow sectional view and B- in Figure 4
FIG. 8 is a cross-sectional view taken along arrow 8. (Explanation of symbols) 20-heat exchanger, 21--effective fin, 23--gas/liquid inlet (straight fin), 26-header, ! ? −
... Dispersion core 7, 30 ... gas-liquid convergence layer, 31-.
・Flow channel layer, 32... Partition plate * 37 "" Through hole, 3
8-...Partition plate (+Idper), 41-...Intake port (entrance vibe). ko≧X Figure 4 28 Figure 5 Figure 6

Claims (1)

[Claims] A gas-liquid fractional core is installed in the Rada circle of Mushichi II &-. The layer A is passed through and separated by a plate with a through hole. & Atrocities-t5eJ
L is composed of 4 mL"C, the first layer is connected to the Ilk father's side (the part that is distributed to the young fin and the header circle 21i4, and the part of the Ilk father's head is connected to the outside of the header, and the header is connected to the iL). A groove is provided in the ore header internal cavity threshold and 611 distribution IIL-road shoulder to allow the external 1IAK fluid to flow in, and each fluid is mixed favorably in the merging layer to the effective fin in the heat exchanger i. The great fin heat exchanger's exhaustion is relieved by the layered image of what it did as if it were flowing in.