FI80613B - RENINGSANORDNING FOER GAS, TILL EXEMPEL LUFT, FOERORENAD MED DISPERGERADE OLJE- ELLER KOLVAETEFOERENINGAR. - Google Patents

Abstract

1. Apparatus for puifying a gas, such as air, contamined by oily or hydrocarbonic liquid compounds dispersed in the said, gas, in particular in the form of mist, of the type comprising a caisson (1) comprising at least one sustantially horizontal inlet pipe (2) for the contamined gas laterally opening into a purification chamber (4) and at least one outlet pipe (6) for the purified gas, the said purification chamber (4) containing, in the flow path of the gas from the inlet pipe (2) towards the outlet pipe (6), a wall (18) for the downward deflection of the gases brought into the said purification chamber (4) and a device for separating the contaminating products by filtration disposed substantially horizontally in the said flow path of the gas, and a part (10) for collecting the oily or hydrocarbonic compounds (12) separated from the said gas and falling into this part by gravity, the said part being provided in the bottom of the said purification chamber and leaving a flow path of the deflected gases towards the separation device below the said wall (18), characterized in that the deflection wall (18) is entirely vertical and provided with a baffle device (22) disposed upstream of the deflection side of the wall and over its whole height, and in that the separation device comprises a first filter (8) for separating by coalescence vesicles of oily or hydrocarbonic products into droplets (14), such as formed of a plurality of metallic cloth layers, and, downstream of this first filter, an additional filter (36) made of a material for fixing the hydrocarbons such as polypropylene.

Description

1 80613

The present invention relates mainly to a purification device for a gas, for example air, contaminated with liquid petroleum or hydrocarbon compounds decomposed in said gas.

The air in industrial areas is often known to be contaminated due to various liquid petroleum or hydrocarbon compounds from oils used for machining, lubrication of molds, cooling, and so on.

in oil or hydrocarbon dispersion plants 15, the evaporation of oil due to the contact of hot bodies results in the formation of mist which spreads throughout the plant, which in turn endangers the health of workers, the quality of the products produced and the risk of accidents and fire 20; also in terms of environmental protection.

It is therefore necessary to remove these mists as they arise.

To date, a device has been proposed for the purification of air contaminated with decomposed liquid oil or hydrocarbon compounds. The already known devices comprise a housing provided with an air supply pipe containing an oil or hydrocarbon compound terminating in a second purification chamber and an air exhaust pipe, said purification chamber comprising an oil or hydrocarbon compound separation device arranged in a vertical or oblique position with respect to the air duct leading from the supply pipe to the outlet pipe, and a collecting tank for oil or hydrocarbon compounds located below the separation device to collect the compounds retained by the separation device as a self-weight drop.

2 80613 The main principle of such known devices, which thus comprise a vertical or inclined separating device, is that after only a few hours of operation the separating device is filled, such separating device generally comprising 5 several metal fabric pads partly below it, , which in turn causes small droplets formed through the association to come in contact with the tissue pads of the separator.

10 This, in turn, means that the separation function is very weak and that the air leaving the exhaust pipe still comprises a certain, quite significant percentage of liquid petroleum or hydrocarbon compounds which have decomposed into the air, which is, however, unacceptable. It is therefore an object of the present invention to solve this technical problem, which has arisen in connection with the efficient purification of air and, more generally, of gas contaminated by liquid petroleum or hydrocarbon compounds decomposed therein.

20 For the first time, the present invention provides a solution to this technical problem.

The invention therefore relates to a purification device of a gas, for example air contaminated with liquid petroleum or hydrocarbon compounds decomposed in said gas, of the above-mentioned type, i.e. it comprises a housing provided with at least one gas-containing gas or hydrocarbon-containing gas. a supply pipe terminating in a second purge chamber and at least one purged gas outlet pipe downstream of said chamber, said purge chamber comprising an oil or hydrocarbon compound separator arranged in the air duct behind the supply pipe at the outlet pipe, further for oil or hydrocarbon compounds a collecting tank arranged below the separating device 35 for collecting said oil or hydrocarbon compounds retained by said separating device and falling at its own weight 3 80613, the device according to the invention being characterized in that the separating device is located approximately horizontally, and that the gas supply pipe 5 to be cleaned terminates laterally in said chamber and preferably approximately parallel to the general plane of said separating device.

According to a preferred embodiment of the invention, the purification chamber likewise comprises a dynamic pre-enrichment device for the decomposed compounds 10 arranged above the separation device. According to a special embodiment, the pre-enrichment device comprises a partition arranged to form a barrier to the gas flow to be fed into the cleaning chamber and to deflect it in this way before it enters the separation device. Preferably, this barrier-forming partition is arranged approximately vertically and forms a partition which divides the cleaning chamber into two compartments, said partition being shorter than the height of said cleaning chamber and leaving 20 free space downwards for gas flow and said partition being preferably , which is arranged in a compartment below or on the discharge side of the cleaning chamber.

According to another preferred construction of the device according to the invention, it comprises, below the above-mentioned separation device, an additional filter made of a certain hydrocarbon-seeking material, preferably polypropylene, likewise arranged horizontally.

According to another preferred structure of the device according to the invention, it comprises, below the above-mentioned separation device, a rinsing system of the separation device, in which the rinsing takes place preferably by killing a suitable product, for example a cleaning agent or solvent.

4,80613

The device according to the invention - in the case of a relatively warm gas, e.g. air from a room or room - is also characterized in that a heat exchanger is arranged at the outlet of the cleaning chamber which recovers 5 calories of gas leaving said cleaning chamber by preheating or for preheating a gas introduced into the space when the gas is other than air, which space may be a reactor.

On the other hand, in the event of a fire, the device according to the invention preferably comprises, in relation to the room or space concerned, a tight insulation system for the cleaning chamber, which according to a preferred embodiment may comprise movable flaps located in the supply and exhaust pipes to avoid the risk of fire.

Other objects, structural features and advantages of the invention will become apparent from the following illustrative description, taken in conjunction with the accompanying drawings, in which: Figure 1 is a schematic sectional view of a gas cleaning apparatus according to the present invention; Fig. 3 schematically shows a space or room formed, for example, as an industrial space with several cleaning devices according to the invention, and illustrates a closed circuit containing a refrigerant, Fig. 3 shows diagrammatically a space or room formed, for example, as an industrial space with several cleaning devices according to the invention; and Fig. 4 is a schematic sectional view of a cleaning device according to the invention with a certain device for recirculating a gas, preferably air, into a room or space to better harmonize the temperature of said room or space.

The purification device shown in Figure 1 for a gas, for example air contaminated with liquid petroleum or hydrocarbon compounds decomposed therein, comprises a housing 1 provided with at least one gas supply pipe (2) containing petroleum or hydrocarbon compounds terminating in a second purge chamber 4, and at least one purge gas outlet pipe 6, said purge chamber 4 comprising an oil or hydrocarbon compound separator 8 located in the gas passage marked by arrows after the supply pipe 2 at the outlet pipe 6, and oil or hydrocarbon compounds retained by the separation device 8 of the collecting container 15 and falling by its own weight, as illustrated by the droplets 14 for collecting said compounds.

This device according to the invention is characterized in that the separating device 8 is arranged approximately horizontally, 20 and that the gas supply pipe 2 to be cleaned terminates laterally in the cleaning chamber 4 and is preferably parallel to the general plane of the separating device 8, as shown in Fig. 1.

According to a preferred embodiment, the purification chamber 10 comprises a dynamic pre-enrichment device 16 for the decomposed compounds, located above the separation device 8. According to a very preferred embodiment, this pre-enrichment device 16 comprises a partition 18 arranged to obstruct the flow of gas fed to the purification chamber 4 and thus deflect said gas before it enters the separation device 8, as can be clearly seen from Figure 1.

This barrier-forming partition 18 is preferably arranged vertically and forms a partition 35 which divides the cleaning chamber 4 into two compartments 4a and 4b, said partition 18 being shorter than the height of said cleaning chamber 4 and leaving a free space 20 downwards for gas flow in Fig. 1 as shown.

According to a particularly preferred structure, 5 shown in Figure 1, the partition 18 is used to fasten the second end 8a of the separating device 8.

According to another highly preferred structure of the device according to the invention, the barrier-forming partition 18 is provided with bounce plates 22 or the like on the whole surface or most of it, which are arranged at a certain distance from the barrier-forming partition wall 18. Thus. for the first aggregation of blisters of decomposed petroleum or hydrocarbon compound products into small droplets 24 which likewise fall under their own weight; said bounce plates 22 are further used to prevent small droplets 24 from disintegrating into the gas.

the collection tank for oil or hydrocarbon compounds can be made in a variety of shapes. In the example 20 shown in Figure 1, this collecting tank 10 is formed from the lower part of a cleaning chamber 4, preferably shaped as a funnel 26, the bottom 28 of which comprises an opening 30 closed by a valve 32 which can be opened if desired by oil or carbon for depletion of hydrogen compounds 12. A grid 34 is preferably placed at the bottom of the cleaning chamber 4 so as to provide a certain physical difference between the actual cleaning chamber 4 and the collection tank 10.

According to yet another structure 30 of the device according to the invention, the separation device 8 is a separation filter which combines the vesicles of oil or hydrocarbon products into droplets and is preferably formed of several layers of tissue, in particular metal, which are preferably relatively thick.

35 Considering that the separating device 8 may not be sufficient for the complete purification of the gas of petroleum or hydrocarbon compounds, the device according to the invention further comprises below the separating device 8 at least one additional filter 34 made of a hydrocarbon-searching material, preferably polypropylene. 5 similarly horizontal and which "traps" the last blisters of oil or hydrocarbon compounds decomposed in the gas.

On the other hand, in order to facilitate the droplet droplets of liquid oil or hydrocarbon compounds which have decomposed into the gas, the device according to the invention preferably comprises a rinsing system 38 below the separator 8, preferably spraying, e.g. or 15 solvents, as the case may be.

On the other hand, when purifying a relatively warm gas, for example the air of a room or room with a temperature higher than the outside air, the device of the invention is preferably provided at the outlet of the cleaning chamber 4 with a heat exchanger 42 which recovers calories from said chamber 4 by reheating a certain coolant. , which is then used to reheat the gas introduced into said room or space, preferably by means of a second heat exchanger 44, shown in Figure 3.

Thus, it can be seen in Figure 3 that the room or space 46 may comprise several cleaning devices 1 according to the invention, each provided at the outlet pipe 6 with a heat exchanger 42 forming part of a closed circuit 48 comprising a heat exchanger 44 for preheating the air 50 with air 50 then at a lower temperature. The same principle applies in the opposite case.

It can be seen from Figure 3 that since the air 50 is re-supplied to the lower part of the space 46, a certain "deposition" of temperature occurs in the space 46. This object 80613 can be prevented by applying the structure shown in Fig. 4, according to which air 50 is supplied to the top of the space 46 by means of devices 52, also available from the inventor under the trade name "dirivent", which allow supply air to streams 54 directed so as to equalize the temperature of the space 46.

Figure 2 also shows a preferred embodiment of the device according to the invention for the general case where oil or hydrocarbon compounds present a fire hazard, the device according to the invention then comprising a tight insulation system 60 insulating the chamber 4 from the space 46. This insulation system 60 preferably comprises flaps 62, 64 arranged to move the feeds in the outlet pipes 6 and intended to close said pipes 2, 6 as shown in Fig. 2 by commands obtained from conventional pressure-liquid, compressed air, electrical and electromagnetic devices known in the art and known to those skilled in the art; they are indicated by reference numeral 66 and are used in conjunction with devices 68 for supplying inert gas to said purification chamber 4 and to avoid the risk of fire. As the inert gas, for example, carbon dioxide gas, halogens and so on can be mentioned. Such gases are also familiar to those skilled in the art.

Any other device known in the art can also be connected to the device according to the invention. For example, a heat pump may be provided in the circuit 48 shown in Fig. 3, or a device may be used to change the gas flow sucked into the cleaning chamber 4, indicated by reference numeral 70 in Fig. 4 and marketed by the present inventor under the trade name Variflow.

On the other hand, instead of the bounce plates 22, the pre-enrichment device 16 may comprise a grid 72 (Fig. 4) arranged obliquely in the compartment 4a of the cleaning chamber 4.

The invention thus encompasses all those devices which form technical variations of the devices described above, as well as their various combinations.

Claims (11)

A gas purification device, for example for air contaminated by liquid oil or hydrocarbon compounds, which has been decomposed into said gas, said purification device for the structure comprising a lida (1) having at least one feed tube (2) for gas containing oil or hydrocarbon compounds, ending in another purification chamber (4), and at least one purified gas discharge pipe (6), said purification chamber (4) comprising a separation device (8) for oil and hydrocarbon compounds, which is located in the gas duct after the inlet pipe (2) at the drain pipe (6), and a collection container (10) for oil and hydrocarbon compounds, which is placed under the separation device (8), for collecting said compounds retained in the separation device (8) and falling of its own weight, characterized in that the separation device (8) is positioned approximately horizontally and that the inlet pipe (2) for the gas which To be purified comes laterally into said chamber (4) and preferably parallel to the general tab of the separator (8). 2. Device according to claim 1, characterized in that the purification chamber (4) comprises a decomposing device (16) for disintegrating compounds which is located above the separation device (8). 3. Device according to claim 2, characterized in that the pre-enrichment device (16) comprises a partition (18) which is arranged so that it is an obstacle to gas flows measured into the suction chamber and in this way deflects the gas before is passed on to the separation device (8). 4. Device according to claim 3, characterized in that the partition wall (18), which constitutes an obstacle, is arranged approximately vertically and divides the cleaning chamber (4) into two compartments (4a, 4b), said intermediate wall (18) is shorter than the height of said purification chamber (4) and leaves a free space (20) for the gas stream and said intermediate wall (18) is preferably intended for attachment of one end of the separation device 5 (8). (8a). 5. Device according to claim 3 or 4, characterized in that the intermediate wall (18) constituting an obstacle is provided with impact plates (22) or the corresponding part of the part of the surface which is arranged at a certain distance from said part. partition wall (18). Apparatus according to any one of claims 1-5, characterized in that the separation device (8) is a separation filter which joins the blisters of the oil and hydrocarbon compounds into small droplets and preferably consists of several tissue layers, specifically metal layers. Device according to any one of claims 1-6, characterized in that it comprises an additional filter (36) below the separation device (8), which consists of hydrocarbon-attracting material, preferably polypropylene, and is arranged horizontally. Apparatus according to any one of claims 1-7, characterized in that it comprises, under the separating device (8), a rinsing system (38) for the separating device (8), preferably injecting a product (40) suitable for the purpose, e.g. means or any solution. 9. Device according to any one of the preceding claims, characterized in that at the opening of the purification chamber (4) there is provided a heat exchange 30 (36) which takes advantage of the calories of the gas removed from said purification chamber (4). coolant, which is then preferably used to heat gas (50) introduced into a room or space (46). Device according to any one of the preceding claims, characterized in that it comprises a tight insulation system (60) between the purification chamber (4) and the room or space (46). Device according to any of the preceding claims, characterized in that the tight insulation system (60) comprises movable flaps (62, 64) which are arranged in the inlet pipes (2) and the drain pipes (6) and which are intended to close said tubes (2, 6), and preferably devices (68) for passing the inert gas into said chamber (4), thereby avoiding a fire hazard.