JPS5941790A - Heat recovery type exchanger operated by convection and radiation effect - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Exchangers operating with heat-carrying gases typically have poor efficiency because the gas flows parallel to the exchange surface and only a small portion of the gas flow engages the exchange surface. be.

In order to improve efficiency, several solutions have been adopted in US Pat. something is described. Cold gas is deflected by this bulkhead boat towards the exchange surface.

The opposingly flowing hot gas on the reaction side of the exchange surface also encounters the bulkhead which is curved towards this exchange surface.
do. Redirecting the gas flow against the exchange surface destroys the boundary layer and allows better heat exchange.

A different type of exchanger is available in the US [1.1 special edition yiy3, 77], 5
It is described in No. 89, where it is written as an exchange style sea lion.
jib times 3'Jj 1R1) is given. The exchanger has a rectangular cross-section 9′r:)[m], the walls of which form an exchange surface (1!j), which is divided into a number of chambers ψ along the length of this 91”(:l). ;1j.Each cell number J is further divided into two by one sloping partition wall facing the exchange surface and defining a first zone whose height decreases in the direction of the exchange gas flow. The second band intersects this V wall by 1/l Ji.
．． ? It communicates with said first zone via a longitudinal slot having edges extended by seven flange towards the four sides. The exchange gas passes through this slot, a flow path being formed by the seven flange towards the exchange surface, upon which it escapes in a swirling manner.

Although the formation of fluid jets or swirls improves heat transfer by convection, in high temperature exchanges a significant portion of the heat is transferred by radiation.

When gas is used as the heat carrier fluid, the radiation exchange is significantly reduced and the efficiency of the exchanger is limited to this range. Follow me! Most exchange KI of IG ya4
In , the radiation is ρ11a inclusion of circumference v11 and ′
(In the cooling circuit where there is an exchange relationship (add the wall)
However, it does not include heat recovery or enable effective cooling.

The main purpose of this invention is to improve the convection type heat exchange by using the jet flow technique.
The object of the present invention is to provide a heat exchanger that can also improve heat exchange by radiation.

From the exchange surface, the radiation of heat generated is stopped by at least one radiating exchange wall parallel to the exchange wall separating the 'A% 7g scum from the cold gas. These two exchange walls define a flow path through which cold or hot gas is circulated in countercurrent flow.

This technique makes ceramic nanostructures well suited for 'l'5.

Convection 119 according to the present invention shown in FIG. The radiation-effect heat recovery converter comprises two modules 1 and 2 arranged one after the other in a +14 configuration. Each module ε' two chambers 3j, 5 and 4 (21st) so 1 no 1!
1 ) including those l) each other, I・below (,”')
A convection type exchange plate is formed by h”i and C:
;%j)jtl by selection 5. These small chambers receive the high temperature gas and the cold 1:i+j gas that come into contact with the surface of the 5-plate 5, and on these surfaces the gases are enthalpy due to the convection effect. It will be transformed into a tower.

These chambers have a truncated Burism shape and are
- It is symmetrical to 13Ij to 5. Each chamber is divided into three zones parallel to the exchange plate surface: a gas intake zone 6, a gas distribution zone 7 and an exchange zone 8. Gas intake zone 6 is exchange plate 5
If the distance rm of the gas intake is the most i9<, the gas intake guide opening in this gas intake zone 6? t9 is in contact with VP at the base of the prism. Gas outlet 10 is replaced a)Y
At the end of Castle 8, it is tilted towards the truncated top of the prism.

In the embodiment shown, the chamber 6 of the module 1 is arranged in series with the chamber 11 of the module 2, while the chamber 12 of the latter, which is symmetrical to the chamber 11 with respect to the exchange 4.times.5.degree. It is in series with the small chamber 4 of the module 1. The chamber 12 is provided with its own gas intake conduit 9.

The gas intake zone 6 is separated from the gas distribution zone 7 by a boated screen 14 formed by spaced blades. The distribution area 7 is exchanged by a radiant exchange wall 15 having circular or elongated openings designed to intercept the gas jet flow towards the convective exchange plate 5. t) Castle 8 is separated. As shown in FIG.
') They are configured as shown in Figure 3 IEi), and the slots in one of these columns are shifted by half an interval from the slots in the other column. There is.

In the above-described configuration of the boat screen 14 formed by the blades placed at the center, the space between them extends perpendicularly to the slots of the +1.j11 shot type exchange plate 15. By this (7.7 J'f'J (J-
This reduces preemptive heat leakage and allows for better flow control and greater uniformity of exchange engagement. Since each blade is longer than its width, it is held midway by a first blade support 18 (see FIG. 5), which rests at least partially on the radiant exchange plate 15. This generally triangular support includes parallel slits on one side thereof into which each blade engages.

The module 7, indicated by reference numeral 1 or 2, is wall-mounted by two lateral flanges 20 (t?, see Figure 4), one on the right-hand side and one on the left-hand side. These seven flanges are in the form of a parallelogram, and within their flesh Jqt exhibit a plate and a screen J1 or a housing. Generally, a linear intermediate groove 21 is provided to receive both ends of the convection type exchanger &5.

Symmetrically around this intermediate groove 21 and on both sides thereof, grooves 22 for maintaining the radiant exchange plate 15 and grooves or housings 25 for the grooved plate 14 or for the blades constituting it are stepped. ing. A groove 24 is provided parallel to the parallelogram and in contact with at least one small side of the parallelogram.
Open into 4. The inner body of the groove 24 is the groove 21 of the convection exchange plate 5.
Open inward L1 (7) If the hot gas is open, the cold gas will flow.
i'111- Each small chamber is separated. Groove 24 is at end f?
KIA J:+ is being praised for the 1st wall 25th. A groove or notch 26 parallel to the parallelogram's major difference i'71 is designed to receive the upper wall 27 and the l+'ε wall 28. One side of Konera's wall has a gas population of 9.
It is integrated with.

If the exchanger is made of two modules, each gap formed on the small side of the parallelogram is open on one side and on the other side. A groove or housing in wall 29 separating chamber 60 of module 2 from chamber 4 of module 1 is formed in half at each edge of the symmetrical assembly of modules 1 and 2. The walls 25 and 29, the boards 5 and 15, and the screen 14, have a length of 1 u in the longitudinal direction for holding them together.
hold

q:', joint and position IF (of each flange of modules 1 and 2).
Tachikawa boss 61 is installed, and there is one boss p,'
l;Ro2 and fM are combined to i? of the first module. 'i 2
1 and 22 are present at 61.

The two-module type father-to-head assembly according to this invention is a simple matter. two identical flanges are connected symmetrically behind each other and in each case interchangeably;
Then, the four-flow type master replacement plate 5 is introduced into the groove 21 along the edge of the groove. "1'i 25 and 29 and board 5
and 15 have their edges (0ξ
It matches. Bo) (=J screen 14 is support 1
After the blades are inserted 11' into the slits 19 of 8, the <Q portions of these blades are slidably engaged into the respective housings 26 of each flange. Interchange+)l! Each 7 flange yielding to the opposite (11) of fq is engaged at the respective end of each plate. The exchanger is closed by connecting walls 27 and 28.

The latter is formed from standard parts and has a gas intake D 9
It is easy to hide the shadows of people.

The i11 solid of the two stiff modules forming the exchanger is enveloped by an insulating mantle 33 (11%, fig. 1)
The entire body is enclosed in a casing 34 made of Kinsho.

The components of each module of the exchanger are, for example, silicon carbide, silicon nitride, mullite, stabilized zirconia, and cordierite. 41 against J pull! Made of ceramic material with strong resistance.

The exchanger of the invention operates as follows: hot gas is fed via the intake duct 9 to the band jQ/) and flows through the boat screen l4. Due to the prism shape of the distribution zone J%57,
The gas is uniformly pressurized into the slot of the plate 15, and the jet flow thus generated impinges on the convection type exchange plate 5. heat fil; is applied to the exchange plate 5 of the first module and then reaches the module of f(λ2, where the gas flow is baud)(J).
However, this screen allows this gas flow to
It is distributed along the ring/1 injection plastic exchange plate 150, from there to the convection type exchange plate 50, and then to the outlet 5, from which it is discharged at a low rate of 7hAj"l-.

The cold and hot gas is passed through the intake duct 90 to the module 2.
The gas then enters the lower chamber of the module 1, following a path similar to that of the trapped gas, but with an opposite direction of flow, and exits module 1 via outlet 66 at R+A and X. .

Convection J (replacement plates 5, 50 are high 7 A'r L i, f!
1c+i'j, but these plates tNit directly to the surroundings. Therefore, 1!1・1 shot QJ exchange plate 15 and 15 of 1 shot high emission f'L
The use of 0 is that these plates recover in one shot a significant portion of the energy provided by the convective exchange plates, and this energy is transferred by convection to hot and cold gases. Ancient Buddha J
・H is done.

The above-mentioned retrieval type exchanger and one device are metallurgical publications - Vuna or gas.
It is suitable for the installation of turbines. This exchanger offers, inter alia, the above-mentioned advantages.

b) The overall heat exchange coefficient is high; Mou) If the heat exchange capacity is the same, the conventional equipment i, lj,
(c) the heat exchange surface can be smaller if the temperature difference is constant and the heat capacity is the same; and (ii) exchange by irradiation The four points are that it is possible to make optimal use of

If the exchanger is modular and has a standard element I:r j+
− by sequentially inputting the module 1” and output[”
By joining and separating the nails,
1'' is made into a central pillar by the 91L length of the round element.

- For example, the availability of modules suitable for recovery in metallurgical ovens for breheating combustion air;
:The symptoms of L 1 are as follows.

Length: 0.3407 Width
0.250771
Meat f'1 to height 0.080m exchange 0.00377! efficiency
7. of 0.2-0.3 transfer units. '(0, 2-0.3 overall exchange rate (?geki is atmospheric pressure) Approximately 150 W/1+r7C Aerodynamic loss on the air side 200-300 Pascal

[Brief explanation of drawings]

FIG. 1 is a partially sectional perspective view of a gas/gas type exchanger according to a preferred embodiment of the present invention. Figure 2 c-h; rs Symmetrical jl of the exchanger in Figure 1
This is a horizontal view along the f-hand direction. FIG. 3 is a top plan view of the exchanger shown in FIG. 1 with parts Ii' removed. FIG. 4 is a perspective view of the two 7-lunges in the two modules constituting the exchanger according to the present invention. FIG. 5 is a front view of the blade support element that holds the boated screen f+1 +R. 1.2...Module:6.4...Small room;5...
Exchange plate; 6...Gas intake zone; 7...Gas distribution 'j'rk: I!柁：8．
Gas outlet; 14...Screen with boat; 15...
・Radiation malt ((゛wood board. 1"? W'l' out 1 (4'1 person: Helchan Kengou Funbaniyo 3 no (1 person: Patent attorney 'lfq Oki)
11f Self's amount: Patent attorney Taira ] 11 - Fist Page 1 continued 0 Inventor Jean Charles Marie Joseph
Muret France 78760 Shuar. Bon Chartrand Rue des Lussières 21 0 Inventor Deniz Lebuffat France 64100 Bayonne Avenue de L'Urschaya de Meur de Bayly (no street address) Procedural amendment (method) % formula % City IlI Relationship with Patent applicant 4 Agent 9 List of attached documents (1) Drawings (Figure 1) 1
45

Claims (1)

[Claims] (1) A heat exchanger operated by convection/radiation effects and having a module TPT structure, each module (
1, 2) comprises two chambers (3, 4) in the shape of a truncated prism extending on either side of a convective exchange plate (5), each of which chambers having three tglp connections generally parallel to said exchange plate. obi j
! is further divided into a gas intake zone (6), a gas distribution zone (7) and a heat exchange zone (8).
The intake zone (6) is the farthest from the exchange plate (5) at a distance of 141t, and the heat exchange zone (8) is the farthest distance from the exchange plate (5).
The heat exchanger has a gas outlet (10) adjacent to the top of the truncated prism shape. 2) Each said module further includes said gas distribution zone (7).
A boat f'' screen (14) which separates the gas intake (1ν region (6)) from the heat exchanger I (7 region (8)
1 t of the distribution band (7);
Is it written in i・1? 3) The radiant exchange plate (15) is provided with a slot extending generally along the direction of flow, and the screen (14) with a boat is provided with a slot. j is provided with a slot extending substantially perpendicular to said slot! 4) Each of said modules (1, 2) is box-shaped and has a pair of opposing generally flat walls, i.e. ends. Part wall (2
5,29), bottom fJf,. (27, 28) and side walls (20), each of which side walls (20) having a generally parallelogram profile and an i. ? a generally diagonal first intermediate groove which is adapted to accommodate the edges of the convection exchange plate (5); (21) is almost symmetrical with this first groove (21) as the base, and is located on both sides of this groove to accommodate the edges of the radiation type intersecting plates (15). a second groove (22) adapted to accommodate the edge of the boat screen (14); A fourth N (24
), and a fifth groove (27, 28) extending generally parallel to the large side of the parallelogram and in contact with the large side Pl for accommodating the edge of the bottom parrot (27, 28). 26) consisting of ↑? The heat exchanger according to item 2 of the scope of revision 1. 5) each box-shaped module (1, 2) further comprises a gas intake duct (9) integral with the bottom wall (27, '28) and leading into the gas intake zone (6);
9. The heat exchanger according to claim 4. 6) The boat screen (14) comprises parallel blades spaced apart from each other by 'I': r
f! "l'H+'j range heat described in item 4: y,
Private organ. 7) at least two similar modules (1
, 2) in the scope of search [J11 No. 4]
The heat exchanger according to paragraph 1, comprising these modules (1
, 2') includes a connecting part of a boss (filter 1) projecting from the small side of one said side wall (20), and the assembly of the corresponding side wall (20) of the other (l!1lv11!(20) Four parts (6.2) are formed in the adjacent pocket money tflt, and C
It also includes a front and rear connection of another boss (61) protruding from the pocket money (?15) on the other side wall, and at this time, another four parts (62) are inserted into the small side of the one side wall. 8) The heat exchanger further comprises a module enclosing casing (64) having an adiabatic ratio (36) of y<q.
:yrr The heat exchanger according to claim 1. 9) Heat exchanger according to item 1, characterized in that the borrowed parts of the modules (1, 2) are made of refractory ceramic material.