DE1775492A1 - Insert bottom with valves for gas-liquid contact devices - Google Patents

Description

Patent attorneys

Dipl. Ing. Walter Meissner ..... "_. . _{ΛΛ /} ~ _η

Dipl. Ing.Herbert Tischer Munich, August 19, 1968

Munich office he

Munich 2, valley 71

US Stoneware, In ··, Tallmadge, Ohio (V ₄ St.

Hit-valve insert tray for gas-liquid contact apparatus

The invention relates to a valved insert tray for gas-liquid contact apparatus, wherein the valves are inserted into openings in the insert base that they are moved by the ascending gas flow lift off their seat on the insert shelf.

The invention is particularly applicable to sieve-like insert trays

Sieve-like insert trays are because of their simplicity and because of the lack of moving parts it has been used to advantage in gas-liquid contact apparatus «The For certain applications favorable properties of the sieve-like insert trays lead to the fact that in others Cases where procedures for the transfer of masses are to be carried out, certain limits are set «

A characteristic of a sieve-like insert tray is the fact that it has a small flow area

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has, i.e. the difference between maximum and minimum flow is smallBa the holes in a sieve-like insert base have a fixed dimension, the tray operates with the utmost perfection only within a narrow range of gas velocity · Any attempt to increase the gas flow above an optimal value only increases the pressure drop through the tray, thereby increasing efficiency drops without increasing the performance of the insert tray or * the entire appliance *

To some extent, these restrictions can be imposed on the operation of a sieve-like insert tray can be counteracted by providing the insert base with floating valves (sniffer valves) * At low gas velocities, these valves remain on their seat in the openings of the insert base, so that the insert tray works like a normal sieve-like insert tray. However, if the gas velocity rises, the valves respond and lift from their seats in the insert base so that gas flows up through the openings below the valves can. This improved design of a sieve-like insert base also makes it possible to work with high gas velocities.

However, the arrangement of valves on a sieve-like insert bottom results in certain additional components. As a result of the occurrence of eddy currents, the valves want to rotate, so that wear and tear occurs move the valves in relation to their openings · In addition, the valves tend to flutter, which is a process liquid flows down through the openings in the insert base below the valves before the gas velocity has risen as high as necessary to keep the liquid on the top surface of the bottom tray

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Accordingly, the object of the invention is to provide a valved insert base, which does not have the disadvantages mentioned

According to the invention, this object is achieved in that, in the case of an insert base provided with valves Valve is mechanically connected to at least one other valve *

This connection is advantageous on the upstream side, i.e. made on the surface of the valves facing the liquid flow

The connecting part is preferably attached to the edge of the valves or close to them.

These measures prevent the valves from turning during operation of the gas-liquid contact apparatus, which increases the service life of the valves and at the same time ensures maximum efficiency of the insert base this part of the valves lags behind in responding to the increase in gas velocities * In this way, the valve flutter is ^{kept at an M -} * rHmnn.

According to a further feature of the invention, the connecting part is shaped so that when the flow hits the Liquid is kept applied to the bottom of the insert «This Measure also serves to reduce valve flutter at increased fluid velocities «It increases also the degree of turbulence within the liquid, which increases the efficiency of the mass transfer is improved on the insert floors "

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775492

Another feature of the invention is that the connecting part distributed over its length with a Number of openings is provided, whereby a reduced resistance for the passage of small amounts of liquid arises · With larger amounts of liquid, take effect these openings act as throttles, creating turbulence and utilizing the force of the liquid flow is to open the valve by acting on the upstream side to keep in contact with the bottom of the insert, so that this also reduces fluttering.

The drawing illustrates an embodiment of the invention, It shows:

1 shows a partial plan view of an insert tray for a gas-liquid contact apparatus;

Fig. 2 is a section along the line 2-2 in Fig. 1}

Fig. 5 is a section along line 5-5 * in Fig. 1;

4 shows a partial plan view of another insert tray;

FIG. 5 shows a section along the line 5-5 in FIG. 4;

6 shows a partial plan view of a further exemplary embodiment;

7 shows a section along line 7-7 in FIG.

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The insert tray 1o shown in FIG. 1 is provided with holes 12 so that the insert tray 1o acts as a sieve tray works

Furthermore, the insert base 1o has a number of openings 14 to which valves 16 are assigned here have the shape of poppet valves and are designed with a slightly larger diameter than the openings 14 "

As can be seen from Fig. 2, the valves 16 are provided with a number of downwardly projecting hooks 18, acting as stops limit the upward movement of the valves »if the speed of the upward flowing Gas is low, the valves 16 remain in the position, which is shown fully drawn in Fig. 2, but increases the gas velocity, the valves 16 go up within the range defined by the hooks 18 and assume the position shown in phantom in FIG.

The valves 16 can be fully formed, they shd but here provided with holes 2o so that the valves 16 are still on the insert base at a slightly higher gas velocity 10 stay seated than would be the case if the valves 16 did not have holes.

The hooks 18 can be provided as independent parts that are attached to the underside of the valves 16 through Rivets, welding or the like are attached. In the present In this case, the hooks 18 are punched out of the valve body so that slots 22 are present »

The direction of flow of the liquid on the insert tray 1o is indicated by arrows 24. The flow of liquid The facing surface of the valves 16 is referred to as the "upstream side" in the further explanation of the invention. designated*

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The insert base 1o is also provided with components, the upstream side of a valve 16 with the upstream side mechanically connect at least one other valve 16 · These components here consist of flat rails 26, which can be attached in any way to the valves 16, for example by riveting or welding In the exemplary embodiment according to FIGS. 1 to 3, the rails 26 are attached to the valves 16 by means of the slots 22 attached by angled the ends of the rails 26 downwardly and bifurcated to form tabs 28, See Fig. 3. After being pushed through the slits 22, the tabs 28 are each attached to one side on the lower side Valve surface raised to attach rails 26 to valves 16

As already stated, the mechanical connection of the valves is made for two reasons « On the one hand, this prevents the valves from turning during operation, which increases their service life « On the other hand, there is an additional mass on the upstream side of the valves, so that the corresponding Section of the valves opposite their outflow side remains when the valves are lifted from the insert base, if the gas velocity increases This reduces the fluttering of the valves

Figures 4 and 5 illustrate an embodiment of the invention, in which an insert bottom 3o has a number of valves 32, each with downwardly projecting hooks 34 as stops and with a connecting part in the form of a Rail 36 are provided, which consists of one piece with the valve 32.

The rail 36 is shaped to support it when flowing of the liquid in the direction of the arrows 38 as a result of the force exerted by the liquid flowing over the insert bottom 3o is exercised, angled down on the insert bottom 3o

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will hold. This design improves the lagging of the leading edge of the valves J2 and results in a desirable one (Turbulence in the liquid flowing over the insert tray, which improves the contact effect.

In the embodiment of FIGS. 6 and 7 has a Insert bottom 4-0 a number of valves 42, each are provided with downwardly projecting hooks 44 as stops. The connecting part consists of one on one Rod 48 attached to rail 46, the ends of rod 48 are inserted into loops 5o that connect to valves 42 from consist of one piece · The rail 46 has a number of openings 52, which are distributed over their length close to the lower edge. «The flow of liquid is through the Arrow 54 indicated.

At low speeds, the openings 52 a small resistance to the flow of liquid through the rail 46 · Act at higher speeds the openings 52, on the other hand, act as throttles in that they Forcing liquid to flow over the top of the rail 46, thereby causing the Improved leading edge of the valves and at the same time the fluid turbulence and thus the contact effect is increased «

Of course, structural changes can be made to the illustrated embodiment, without departing from the scope of the invention

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Claims (1)

Patent attorneys Dipl. Ing. Walter Meissner
Dipl. Ing. Herbert Tischer he Claims 1 · Insert tray with valves for gas-liquid contact apparatus, with the valves in Openings of the insert base are used so that they are moved by the ascending gas flow from their seat lift off on the insert base, thereby characterized in that a valve (16,32,42) with at least one further valve (16,32,42) mechanically connected is· 2 «insert base according to claim 1, characterized characterized in that the connecting part (26,36,46) on the hand of the valves (16,32,42) or · near same is attached * 3 · insert base according to claims 1 and 2, characterized in that the The connecting part (26,36) is designed as a flat rail 4 «insert base according to claims 1 and 2, characterized in that the Connecting part (36) is shaped so that it is applied to the insert base (1o) when the liquid flows against it is held 5 · insert base according to claims 1 and 2, characterized in that the 209812/0378 The connecting part (26,36,42) with the valves (16,32,42) consists of one piece « 6 insert base according to claims 1 and 2, characterized in that the Ends of the connecting part (26) are angled down and bifurcated, and the tabs formed thereby (28) inserted through slots (22) in the valves (16) and, depending on one side, on the lower surface of the Valves (16) are bent 7 · insert base according to claims 1, 2 and 4, characterized in that the Connecting part (46) distributed over its length is provided with a number of τοη openings (52) « 8 «insert base according to claim 1, characterized characterized in that it has holes (12) for the passage of the glass when the valves are closed (16) is provided 9. insert base according to claim 1, characterized in that at least some Valves (16) are provided with holes (2o) for the passage of the gas when the valves (16) are closed « 2098 12/0378