DE1757226A1 - Method and device for oil misting of gas lines - Google Patents

Description

Patent attorneys

Dr.-fng. VL Stczkmatr β Münzten 22. MaximiUoastr. $ 4

German Patent Office Received

1UPR1968

PH XQt ^ 7

======== ^{after work}

17 plants __ /

20/33.

DUSiB SÜPPBESSIOli LIMIEBD

St. Mary Ax House, 56-60 St-Mary Ax, London E.C. 3

England

Method, among other things, device for oiling gas lines

The invention relates to a method and a Device for oil misting of gas pipes to the formation and suppress movement of particles in gas pipes.

By introducing oil into gas lines, it is possible to prevent corrosion and thus the formation of particles to suppress. In addition, the movement in front of-r, present particles are prevented as they are caused to adhere to surfaces within the conduits. In the end leakage is prevented as the oil swells the Sealing causes.

Ee fcar used to be common, carbonization gas with high! Humidity 3-

salary at relatively low speeds to promote mainstream events. Sin part of the moisture gohlug fioh down on the inner surfaces of the conduits or

-. · NnißlNAL INSPECTED · ' ίΟ ·· 1Ο / β »1Τ ORIGINAL»

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stuck to it, hit the result that host, dust ~ and other particles within the pipelines in large quantities Were held or wet on the inner surfaces ^ - settle as cohesive deposits in the pipes

* and from which gas was not carried.

Recently, however, it has often become necessary to send drier gas from man-made hydrocarbons or natural sources through the gas pipelines. This quickly leads to the inner surfaces of the gas lines drying out. In both old and new gas lines, dust, dust and other particles are entrained and carried along by the gas and cause numerous malfunctions, such as clogging of filters, small pre-nozzle bores or gas engine regulators.These malfunctions can be reduced or eliminated if the gas contains an admixture of one finely distributed oil mist, which adheres to the inner surfaces of the lines, prevents their corrosion and holds the particles present. Various methods have been used to carry out this process, particularly in the USA, where so-called oil foggers are used, some of which operate by spraying cold oil and some of which heat the oil to temperatures above its evaporation point . However, the previously used methods and devices for oil misting in * gas lines were due to ineffectiveness · V or excessively high costs for installation and maintenance or .Operation not completely satisfactory. ORIGINAL INSPECTED

109810/0717

It is therefore the object of the invention to provide an improved method for oil misting of gas lines and a device to use it to ensure that the formation and movement of epidemics in gas pipes is effective and is economically feasible.

This object is achieved according to the invention in that dispersed oil is introduced into a gas stream, iufien the oil is sprayed into the gas under high pressure and the dispersion of the oil in the gas is enhanced so that the gas is in the form of levers and droplets in it dispersed oil is enriched, after which the oil-bearing Gas is sent through a separator to remove most or all of the larger oil droplets and any solid ! Remove particles and the gas with the oil mist afterwards sent through the gas pipe.

The oil dispersion in the gas can be caused by vortex formation in the gas stream at or near the point where the oil sprayed into the gas. The vortex formation is advantageously carried out by means of an oil spray nozzle assembly, which is arranged within the pipe carrying the gas.

Optionally, the oil dispersion in the gas can be enhanced by passing the gas through a venturi and the oil on or in the vicinity of the constriction of the / enturi tube is sprayed into the gas.

109810/0717

A medium or light oil, for example a diesel oil, gas oil or spindle oil of good hamleis quality, is preferably used, but any suitable oil or oil mixture with or without spreading agents, bo st contraceptives and / or other additives such as haters or steam and Oxyethylene docosyl, may be used- Generally, the oil is introduced into the butt at about ambient temperature, but it can be heated or cooled as desired if the cousin is particularly cold or other circumstances so require.

It is advantageous to introduce the oil under high pressure through one or more nozzles or fine atomizers "" m the To favor dispersion of the oil in the gas.

Any suitable shape of separator can be used} Economy and efficiency can be achieved with a separator can be achieved in the form of a cyclone chamber which can be cylindrical, or a conventional tapered or cone-like shape. In some cases it can be beneficial to use a scrubber Column or countercurrent type to be used. The separator should be able to remove the larger oil droplets, for example from 20 microns and above, and allow the gas to come in with a reasonable amount of smaller droplets or oil mist to flow through. The oil removed from the gas in the separator can be recovered and reintroduced into the gas stream processed, for example by resting in a settling tank,

109810/0717

so that larger solid particles can be deposited, after which the oil is drained and filtered.

Fresh oil is introduced into the gas stream either separately or mixed with pumped oil as described above at a suitable rate which depends on the prevailing circumstances. If, for example, the gas is to be sent through a relatively short stretch of a new or clean gas line, the ratio between oil and gas can be kept small, whereas it must be increased when loading a longer length of an old or corroded gas line. Tests have shown that with conditions that may occur in practice, which as a mist entrained in the gas oil amount is about from 0.05 to 3.0 gallons (0.23 13.6 liters) of oil per million cubic feet (28 320 V ?) Gas must lie in order to suppress the movement of lights sufficiently and economically. Depending on the prevailing conditions, the 01 quantity can be set and changed. For example, a larger amount may be desired in order to effect a first oiling of the line. The amount of oil can then be reduced.

It is not necessary that the whole is taken up into the gas stream · through a conduit to send gas in which the is first dispersed, since the gas flow from the gas can be made, which is derived from a Hauptgasfluß, or of gas from a separate source . The oil-carrying gas flow can be mixed with the main gas flow after it has passed the separator,

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or the oil-carrying gas stream and the main gas flow can before Entrance into the separator or mixed within the same will. . ,

A device for performing the inventive * f-eQirens is characterized by a high pressure pump and an or several fine nozzles or atomizers for introducing dispersed 01 in a gas stream, a device for enhancing the oil dispersion in the gas stream, so that this with the as oil mist and -droplet is enriched in the gas dispersed oil, as well as a separator that allows most or all of the larger droplets and solid particles (if any) are removed from the gas stream.

In one preferred embodiment, the apparatus comprises for Reinforcement of the oil dispersion in the gas flow an oil spray nozzle assembly, which is arranged within a bore through which the gas flow flows, whereby the gas flow is swirled.

In a modified version, the device ordered for the enhancement of the dispersion of the (XLs in the gas stream from a constricted or venturi tube through which the gas stream flows, with some or all of the nozzles or atomizers on or in the Are arranged near the constriction of this tube.

The separator can be of the type that resembles a vortex or cyclone chamber, tapered, cylindrical, or other suitable ones Form aif shows.

In some cases there will be no need for fans or blowers to flow through the venturi and shut down the separator and it will be possible to

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to let all or desired portions of a main gas flow flow through the venturi tube, as well as the use easier Devices in a gas line, such as venturis or Well plates to identify areas of higher and lower pressures for withdrawal and reintroduction of a bypass gas stream to form for the oil mist. Although the simpler forms of the devices have advantages, it is possible to use power operated Add fans or other vortex devices and introduce various other modifications without removing the frame of the invention. leaving.

The ^v enefits, a relatively simple device to be used include low installation, operating and maintenance costs, a, low energy consumption, easy control and the ability to use the equipment on unmanned distribution stations in a gas line system.

Apparatus for practicing the invention is shown in US Pat an exemplary embodiment explained with reference to the drawings. It shows:

Fig. 1 is a side view of the device;

Fig. 2 is a sectional view along the line II-II of Fig. 1} Fig. 5 is a partial plan view; and

Fig. 4 is an individual view in section along the line IV-IV of Fig. 5-

109810/0717

The device shown comprises a cyclone separator with a cylindrical housing main part 10 with a cover and an outlet 11, a lower housing part 12 and feet 13 · A gas flow enters the housing main part 10 substantially tangentially through tubes 14 and 15 and an inlet 16 and passes through Outlet 11 and eini;, to a (not shown) main gas line '' ' leading pipe 17 from. A flanged branch pipe 18 of the .Tube Ii? carries a nozzle holder ep latte 19 on which a nozzle assembly, including a pipe 20, a T-piece 21 and two connections 22 for nozzle bundles with seven fine spray nozzles 23 each (Pig x 4) is arranged.

Oil is fed to the nozzles 23 through an Itohr 24 under high pressure. The oil is supplied from a reservoir 2. ^1}, (Pig. I) through a filter 26 and a pipe 27 a of a fireproof 24-volt direct current motor 29 driven pump 28. From the pump 28 the 01 runs through a rotary measuring device 30 and enters the pipe 24, from which a branch pipe 31 leads to a pressure-actuated electrical switch (not shown), which is located in a housing 32, advantageously arranged on one of the feet 13 . The function of the switch is to open a circuit in order to actuate a relay with which the motor 29 is stopped in the event of excess pressure in the pipe 24 provided with a pressure gauge 33. A valve 34 can be closed in order to interrupt the flow of oil for changing the filter 26 or the connection to the pipe 27 and the pump 28. The pump

BADORiGlHAL 10 9 8 10/0717

28 contains an overpressure adjusting valve (not shown) which diverts oil back to the container 25 through a rotor 35. 01, which was separated from the grass stream and collects in the separator, flows through pipes 36 and 37 _5, a gas lock 38 and a pipe 39 back into the container 25 _s which is provided with a lid with a filler cap 40 and vent port 41. Valves 42 and 43 are respectively for a possible emptying of the container 25. of the separator provided. The motor 29 is connected to the pump 28 by means of a flexible coupling 44 within a guard. An immersion heater (not shown) is arranged in the container 25 to supply the oil adjacent to the pipe leading to the valve 34 and the filter 26 warm up if the device is to be operated in a cold environment.

From the above description it can be seen that the device shown uses a method according to the invention and the high pressure pump 28, comprises the nozzles 23 for introducing dispersed oil into the gas stream in the pipe 151 and a device for enhancing the oil dispersion in the gas stream, see above that the latter ti is charged with oil that is dispersed as oil mist and droplets in the gas. It also has the separator with which most or all of the larger droplets and solid particles (if any) are separated from the gas stream. In the illustrated Geiiät the apparatus for enhancing the oil dispersion comprises the arranged in the pipe 15 Ölsprühdüsenaufbau, including the T-Sfcücks 21 and the terminals 22 to a turbulence in the tube dös Gasstroma l'j .to. cause.

BATH ORIGINAL

1098 1Ü / U7 17

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In a modified embodiment (not shown ) , the tube 15 has the shape of a constricted or venturi tube. and some or all of the nozzles are located at or near the throat of this tube.

BADORIQINAL

10/0717

Claims (6)

-11-P a te η tan Proverbs 1. Process for the oil sealing of gas lines in order to suppress the formation and movement of particles in the gas line, thereby ensuring that dispersed Cl is introduced into a gas stream by spraying the gas under high pressure and the .Dispersion of the oil in the gas is increased so that the gas is enriched with oil dispersed in it in the form of a lever and droplets, after which the oil-carrying gas is sent through a separator ¹ , uia most of them or to remove all larger droplets of oil and any solid particles. and the gas with the oil mist then sent through the gas pipe wtro- .: .. 2. The method according to claim 1, characterized in that g e k e η η ζ e i c h η e t that the (!! dispersion in the gas by vortex formation in the Gasstroa at or near the Jtelle, all of the Cl in the Gas is sprayed, is amplified. 0 » 7erfahren according to claim 2, characterized. . geke η η ζ eichu et that the whirling r.itteis one within a fülireuijiii the gas. Itolirs arranged as an oil spray nozzle assembly takes place. 4. The method according to claim 1, characterized ge k en η ζ. e I η et that the Cldisperoioii in the G. d is strengthened by the fact that the gas is passed through a V / aturi tube and the Dl in d ;. ζ ir an or in dor Lahe de.-. ' introduction of dec / ent. in your ear s is checked * 109810/0717 1 1 ^s J 5. Device for performing the method according to one of the Claims 1 "to 4, characterized by .._ a High pressure pump (28) and one or more fine nozzles (233) or Atomizer for introducing dispersed oil into a gas stream, a device for enhancing the oil dispersion in the gas stream, so that this is enriched with the oil dispersed as oil mist and oil droplets in the gas, as well as a separator (10, 12) with which removes most or all of the larger droplets and solid particles (if any) from the gas stream. 6. Apparatus according to claim | ?, characterized marked e t that the device for enhancing the oil dispersion in the gas stream has an oil spray nozzle assembly (22, 23) which, within a pipe "(15) is arranged through which the gas stream flows, whereby the Gc.sstrom is swirled. 7. Device according to claim 5 for carrying out the method according to claim 4-, characterized in that the device for enhancing the oil dispersion in the gas stream consists of or comprises a necked or venturi tube through which the gas stream flows, some or all of the Nozzles or atomizers are arranged on or in the vicinity of the constriction of this tube. 109810/071 7 Read 11 e