DE2249992C2 - Device for cooling gas with pulsation tubes - Google Patents

Description

characterized in that the front (8, 8 ') or rear edge (9, 9') of the open pipe end (6a, 6'a) of the distributor pipe (6) in or so against its direction of rotation (F) only in each case extends over such an arc length (V ", L) that upon rotation of the distributor pipe (6)

e) initially the inlet opening (ia) of a pulsation tube (1, V) is in free communication with the chamber (2),

f) then the inlet opening (ia) is completely covered by the front edge (8) and thus its free connection with the chamber (2) w is interrupted,

g) then the inlet opening (ia) comes into free connection with the open pipe end (6a ^ of the distributor pipe (6),

h) then the inlet opening (ia) is completely covered by the -t "> rear edge (9),

i) and finally the inlet opening (ia) is again in free communication with the chamber (2).

2. Apparatus according to claim 1, characterized in that the arc length (L) of the rear edge (9) is greater than the arc length (I ") of the front edge.

3. Apparatus according to claim 1 or 2, characterized in that the inlet openings (Lavalier pulsation tubes (1, V) with respect to the turning circle of the distributor tube (6) have essentially the same arc lengths (I) , and that the arc length (I " ) of the front edge ps (8) essentially equal to the arc length of the fine inlet opening (lajist.

4. Device according to one of claims 1 to 3, characterized in that with respect to the turning circle of the distributor pipe (6) the arc length (I ') of the open pipe end (6a ^ greater than the arc length (1) of an inlet opening (1 a) is.

5. Device according to one of the preceding claims, characterized in that the circular arc-shaped front (8,8 ') and rear (9,9') through thickened end parts of the open pipe end (6,6'a ^ des Distribution pipe (6) is formed.

6. Device according to one of the preceding claims, wherein the diametrically extending through the chamber manifold has oppositely arranged, open pipe ends and the supply line of the continuous gas flow to the distributor pipe is formed by a pipe which is mounted in the central axis of the chamber and fixed to the Manifold pipe is connected, characterized in that both open pipe ends (6a, 6'a ^ each have circular arc-shaped edges (8, 8 ', 9, 9'), the edges (8, 9) of one pipe end (6a,} each have a distance from the edges (8 ', 9') of the other pipe end (6'a) .

7. Apparatus according to claim 6, in which the pulsation tubes are arranged radially along the circular chamber wall, characterized in that the axes of their inlet openings (ia) do not run through the center of the chamber (2), but at an acute angle (ex.) are inclined in the direction of rotation (F) of the distributor pipe (6).

The invention relates to a device for cooling gas according to the preamble of the patent claim 1. Such a device is known from DE-OS 19 38 935, FIGS. 9 and 10.

Devices of this type are of a simple mechanical design and allow gases to be cooled using the energy contained in the gas. One technical application is in the field of Cooling of natural gas for the purpose of oil removal by condensation of the oil to be removed.

In the known device mentioned at the beginning, the distributor pipe is contained in a rotary valve, which is rotatable within the chamber in which there are inlet openings where the manifold is located is moved past one another. The inlet openings are aligned with the pulsation tubes, with there are interruption points between the pulsation tubes and the inlet openings. The location the inlet openings to the pulsation tubes does not change during operation, so that the Pulsation tubes remain permanently connected to the chamber via the interruption points. Of the The thermodynamic process taking place within the pulsation tubes takes place as a result of the connection of the Pulsation tubes with the chamber not optimal.

The invention is based on the object of designing a device of the type mentioned at the outset in such a way that that with a temporary free connection with the chamber, the pulsation tubes after filling for a certain time remain closed.

This object is achieved with the means specified in the characterizing part of claim 1.

When operating such a device, each pulsation tube is during its filling and some Time afterwards locked by the chamber. Only after the desired thermodynamic process has elapsed inside the pulsation tube, which leads to stratification within the gas column by im Pulsation tube zones and relatively low zones

Relatively high pressure arise, and the connection with the chamber will require a certain amount of time manufactured The process of filling and emptying a pulsation tube can be divided into four phases. In a first phase, the front edge closes off the pulsation tube from the chamber. In the second During the phase, the distributor pipe and the pulsation pipe coincide. In the third phase the pulsation tube is used closed off from the chamber by the rear edge. The pulsation tube is in the fourth phase in communication with the chamber.

The invention brings a substantial improvement in the stratification with it, so that for a desired Cooling of the gas «s fewer stages are required than with the known device. With technical Applications are usually several devices according to the invention one after the other switched because the gas cooling within a device is relatively low.

It is particularly advantageous to make the arc length of the rear edge greater than the arc length of the front edge. As a result, the desired termination time for the pulsation tubes is achieved with a uniform rotational speed of the distributor tube. It is also expedient, according to claim 3, to make the arc length of the front edge only as wide as the arc length of the inlet openings. This avoids premature closure of the pulsation tube, which is located in front of the pulsation tube to be filled. If, according to claim 4, the arc length of the open end of the distributor tube is greater than the arc length of the inlet openings of the pulsation tubes, a longer communication between the distributor tube and the pulsation tubes is achieved, which is generally desirable.

The front and the rear edge can be constructed in a particularly simple manner by means of thickenings according to claim 5 achieve. In principle, the distributor pipe can only have one open pipe end. Particularly advantageous, however, are diametrically opposed outflow openings according to claim 6. With a deviation of the axes of the pulsation tubes from the radial direction according to Claim 7, the rotational speed of the manifold is taken into account, the gas flow also granted a component of movement in the circumferential direction.

In the following, a Ausführungsbe.spiel the invention will be described with reference to the drawing. It shows

Fig. 1 is a cross section along line I-l in Fig.2 by a device according to the invention,

FIG. 2 shows an axial section along line II-II in FIG. 1 and

F i g. 3 is a schematic cross section showing a construction detail.

As is known from the prior art, the device has a cylindrical chamber 2 Radial pulsation tubes 1, Γ, from which in Fig. 1 only two are shown for the sake of simplicity. The chamber 2 has one or more Sampling pipes 3,3 'for cold gas and is equipped with bearings 4, 4' and seals 5, 5 ', which are opposite seal with a rotating gas distributor. The gas distributor exists in the illustrated embodiment from a manifold 6 communicating with an axial feed pipe 7 and two has diametrically arranged open pipe ends 6a, 6'a. The gas distributor is generally in the direction of the arrow F z. B. by a suitable, not shown in the drawing. Engine or by the recoil effect of the exiting gas jets driven. In the latter drive, the axis of the manifold is 60 shifted relative to the axis of rotation, as shown in FIG. 3 is shown so that the out of its openings exiting gas jet a torque about the latter axis due to its movement size

"<generated

According to the present invention, the rotating manifold 6 has on both sides of its open ends 6a, 6'a thick edges 8/9 or 8 '/ 9 \ those seen with respect to the direction of rotation F in front of and behind the openings

ii are arranged. The front edge 8, 8 'has an arc length / "which is essentially the same as the arc length / of the inlet openings la of the pulsation tubes 1, while the rear edge 9,9' has an arc length L which is greater than /, where the Pipe end 6a has an arc length / 'which is equal to or greater than / and can also reach 2.5 /.

On the basis of these measurements it follows that the front edge 8, 8 'the inlet openings la des Pulsation tube, in front of which the manifold 6 pass

- ^r > , covers, and that it only exposes this inlet opening to the extent that the manifold 6 moves past the inlet opening, the inlet opening la is fully released when the pipe end 6a of the manifold 6 completely on the

J "inlet opening la is aligned The rear edge 9, 9 'in turn, the inlet opening la will increasingly close to the extent to which the pipe end 6a the Position in which there is full correspondence with the inlet opening la, leaves, and out of this

i ") position removed until finally a complete one Completion is established. The thick edges 8 and 9 so have the effect that they in the course of Filling phase of a pulsation tube 1 prevent the gas from escaping from this pulsation tube before it worked there.

Since the arc length L of the rear edge 9.9 'is greater than the arc length / of the inlet opening la, the pulsation tube 1, Γ will remain completely closed for a certain time, with the closure

4> ßungszeit depends on how much L is greater than /. This closure exists before the inlet openings la of the pulsation tube is released and thereby connected to the chamber 2, from which gas at a temperature is withdrawn via the extraction tubes 3.

> <> men, which is lower than the temperature of the gas at entry 7.

The axes of the pipe ends 6a, 6'a of the rotating distributor pipe 6 are at an angle λ relative to the axes of the inlet openings la of the pulsation tubes 1, the angle α being chosen so that the discharge speed V of the gas corresponds to the circumferential speed iV of the distributor pipe 6 combines that the absolute velocity vector W of the gas emerging from the manifold with the

^bl) axes of the inlet openings la coincide.

The play between the rotating manifold 6 and the collecting area of the chamber 2 must be as small as possible in order to prevent hot gas from escaping to the cold extraction tubes 3 because of how

^ri possible to avoid. For this purpose, labyrinth seals 10, 10 'can be arranged.

1 sheet of drawings

Claims (1)

Patent claims: 1. Device for cooling gas with pulsation tubes in which a gas is intermittent is compressed under temperature increase and relaxed under> temperature decrease, a) with a large number of pulsation tubes, which are arranged one behind the other on an arc of a circle and each have an inlet opening, b) with a circular chamber into which the inlet openings open, c) with a distributor pipe rotating in the chamber perpendicular to its longitudinal axis, the with its open pipe end each of the inlet openings one after the other during the rotation passes the pulsation tubes and increasingly covers them and releases them again, d) and with a train guide for a continuous flow of a pressurized gas into the distributor pipe, which as a result of its open pipe end sliding past in front of the inlet openings of the pulsation pipes with the Pressurized gas applied intermittently,