DE1979623U - DEVICE FOR THE SEPARATION OF CAREFULLY DETERGENT COMPONENTS, SUCH AS PERCHLORAETHYLENE, IN THE EXHAUST AIR OF AUTOMATIC CLEANING MACHINES OD. DGL. - Google Patents

Description

RA.-B02G362 131267 Π

Patent attorney Dr.-lng. R. K. LOBBECKE

1 BERLIN 37 (ZEHLENDORF) / NEUE STRASSE 6 TEL .: (0311) 84 81 OS

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Hellmut IBICH
Berlin

Device for the elimination of cleaning agent components carried along, like perchlorethylene, in the exhaust air of cleaning machines or the like.

The innovation relates to a device for eliminating chemical detergent constituents that have been carried along in the exhaust air from cleaning machines. she

aims at a practically complete cleaning of the leg machines, z, B * coin-operated machines, during the Drying periods escaping exhaust air and at the same time the recovery of the cleaning agent itself for further use Use in the machines as well as the constant reuse of the cooling water including that in the machine required amount of cooling water and thus savings of the fairly considerable, previously required for each batch Cooling water consumption "

When used in such leg machines Cleansing agents or solvents are partly poisonous, at least harmful additives, such as perchlorethylene, which was heated by the drying process at the end of the treatment Drying air are carried along and inadmissible contamination the air or the wider atmosphere ».

Attempts have already been made to counteract these deficiencies in the usual automatic cleaning machines by by providing separate drains over the roof through which the perchlorethylene-containing, Gaseous or foggy components of the exhaust air from the area of the operation and the installation rooms were derived, but essentially only achieved a greater diffusion in the atmosphere in this way of the environment »As a result of the high specific weight of the usual chemical cleansing agents, such as for example perchiorethylene, these proportions fall

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very quickly in condensed form and result again a nuisance or even damage to health in the wider area »

Such derivations also required special triggers that were resistant to chemical attack, like inside leaded drill or with corresponding coverings lined free chimneys, the protective layer of which however required constant maintenance and with the temperature-wise constantly changing load the stresses mostly not sufficient. Bs then entered the increased risk that such e.g. Exhaust air leaked through leaks and entered the living rooms adjacent to the chimneys and caused unpleasant odors or unhealthy smells Led to air pollution.

Another way of eliminating these constituents was during the drying section of the cleaning machine to divert exhaust air into the machine's cooling water and with it into the Discharge sewer pipes for general drainage · Here, however, it was neither achieved that nor Exhaust air that has to be discharged in large quantities has been sufficiently cleaned, and the cleaning agent, which is actually quite expensive was recovered; In addition, there was inadmissible contamination of the general wastewater.

The innovation, on the other hand, aims to purify the exhaust air as far as possible, and in any case to such an extent that a hazard or nuisance

can no longer occur. Furthermore, an almost complete Recovery of the cleaning agent used in the machine bath, the liquor, is achieved, which also an economically significant advantage is achieved. It is also very important that when using the method according to the innovation, the previously high cooling water consumption of the machine, which is approximately per filling 150 1 is normally saved, since the cooling water is now constantly circulated after the firing, with which a further increased economic efficiency is connected.

The innovation is characterized by the fact that the material that escapes during the drying process of the machine Exhaust air enriched with the chemical cleansing agents . inevitably through a cooling system with cleaning agent cutter is passed and the entrained gaseous or foggy detergent constituents condensed and because of their higher specific gravity they can be recovered Form of innovation take place under water, with the heavier condensate then at the bottom of the water tank of the detergent is recovered »According to another embodiment, the elimination of the Solvent from the exhaust air essentially in one Cooling coil surrounded by the circulating cooling water with collecting parts for the condensate. With both devices

the cooling water is no longer drained after each batch, but is constantly circulated by a pump, and if necessary with the inclusion of the cooling system of the machine itself *.

The exhaust air is completely cleaned and can flow through a filter when it leaves, in which also the last traces of the cleaning agent be eliminated before the exhaust air enters the atmosphere »

Exemplary embodiments are shown in the drawings der.Additional device for cleaning machines ο »like, reproduced, It shows?

Fig. 1 in a vertical view schematically a

Execution with representation of the cooling water circulation and the introduction of the exhaust air into a constantly renewing water basin and FIG. 2 a further embodiment with preceding. ^: separate coiled separators in

the water basin: for the Eeini- ^; agent »

The cleaning machine 1 is shown in FIG with the exhaust air duct 2 * in order to avoid an obstruction in the installation room of the machine (s) after the innovation, the additional device is housed below the tree, for example * This consists of a water storage tank 4 in which

the exhaust line 2 opens, more or less deeply with the mouth below the always the same Height maintained water level 5 depending on the present. Bridge conditions »In addition, the cooling water discharge line 3 from the cleaning machine to the vicinity of the Bottom of the container 4 out. A hood 8, preferably made of plastic, is provided over the container with a Outlet nozzle 14 for the outflowing, cleaned exhaust air. If desired, in this outlet connection 14 a lowering filter can also be provided, which also holds back the last traces of solvents, for example using active carbon. At the bottom of the container 4 there is a drain cock 7 ″ next to the Container 4 is a reserve container 9 for the cooling water reserve 10 provided, in which via the overflow pipe 13 while maintaining the same water level 5 in the container 4 the cooling water passes, and from which container 9 the pump 11 sucks the cooling water and Via the return line 12 again through the cooling system of machine 1 presses »

In Fig. 2 is a modified embodiment reproduced the exhaust air purification device in which the water storage tank is again designated by 4. The cooling water drainage line also opens into this 3>, and the overflow pipe 13 leads into the already described reserve container 9 »The container 4 is, however

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divided into two trees, namely once in the upper part for the cooling water and in a lower part 6 for the recovered perchlorethylene, which according to the first embodiment is located in a sump 6 without a partition (Fig, 1) due to its higher specific weight. Pie exhaust air line 2 is, however, after this second embodiment in front of its bundle confluence in the cooling water in several, for example, vertical turns out, each lead up to the intermediate floor above the Per chlorethylene tank 6 and at the points of contact Flow pipe socket 16 directly to this tank exhibit. According to the division into two containers, two drain cocks, 15 for the cooling water and 7 for the perchlorethylene, are provided in this embodiment, by means of which the cooling water can be drained or »the perchlorethylene is recovered» The mode of operation is as follows; At the beginning of the drying period of the machine and switch on its dry air fan at the same time by hand, or preferably automatically coupled with the automatic operation of the machine itself, also the pump 11 is put into operation «

The container 4 is already up to the overflow, d * h « up to water level 5, filled and the amount of cooling water that continues to enter runs through the overflow pipe 13 into the equalization and bin 9> from which the pump 11

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extracts the cooling water and presses it back into the machine »The exhaust air escaping during this process is printed through the line 2 into the water storage tank 4, where upon entry: into the water a Sufficient cooling and condensation of the cleaning agent carried along takes place, which is due to its significantly higher specific weight compared to water drops and collects at the bottom of the container 4. With sufficient enrichment the perchlorethylene can then removed through the drain cock 7 and the cleaning machine can be added again as required.

The exhaust air gushing out of the container 4 collects in; the hood 8 and can now be cleaned State escape through the connecting piece 14. If there should still be odor nuisance, these can also occur the last traces of cleaning agents carried with you by a Filters in the nozzle 14 are excreted. A special derivation over the roof is not necessary *

When using the for example shown in ilg »2 The separation device is the exhaust air line 2 after entering the cooling water volume of the tank 4 first diverted in several queues, whereby the entrained gaseous or foggy detergent components condense in the vertical branches and through the pipe sockets 16 in the lower bends flow directly into the tank 6. Well, as far as possible Purified exhaust air enters the end of the snakes through the * which is again slightly below the water level

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P.A: BQ26362 13,126?

Mouth of the exhaust air line 2 and is then, as in the first embodiment, collected in the hood and discharged again through a nozzle, with or without an outlet filter.

The innovation is not limited to the versions shown but can be maintained while maintaining; the basic idea can be largely changed. Thus, for example, several machines can be connected to a single device with the appropriate pump circuit and with further derivatives. The installation of the additional device is not dependent on the accommodation in a tree below the machine, as shown in order not to exceed a certain temperature, as all conventional systems for regulating the cooling water temperature are to be used.

Expectations;

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Claims (1)

PA.-B02G3G2 13.126? ä " Expectations ; 1 “Device for excretion of entrained Cleaning agent components in the exhaust air from cleaning machines and for the recovery of the cleaning agent, such as Perchlorethylene or the like, thereby marked ei chnet that the leakage during the drying process of the machine, with the used cleaning agent enriched exhaust air is inevitably passed through a cooling system with a liquid separator and the entrained gaseous or foggy detergent components condensed and accumulated due to their higher specific weight ». 2. Device according to claim 1, characterized in that that the gaseous or drop-shaped cleaning agent components in the exhaust air condense under water and recovered at the bottom of the water tank. 3.Vorrichtung according to claim 1 and 2, dadur ch indicated that the cooling water of the cleaning machine is used as the coolant. 4. Device according to Aisprüchen 1 -3, characterized in that the for Cooling water used by the machine is returned to the machine in a circuit, - 11 - 5 # Device according to claims 1 to 4, characterized by a water storage tank (4) with a constant overflow (13) Height of the water level (5) of the amount of cooling water held, in which the exhaust air line (2) of the machine opens below the water level (5), and through a drain cock, (7) at the bottom of the container (4) for the condensed cleaning agent, as well as a circulating water cooling system (3, 11, 12) for permanent Umwälaung the contents of the container (4) during the exhaust air supply, 6 «device according to claim 5, characterized by including the machine's water cooling system (1) into the cooling water circuit of the additional device. 7β Device according to claims 5 and 6, characterized by a feed pump (11) in the circulatory system. 8 »Device according to claim 7> characterized by automatic switching on and off -the feed pump (11) from the machine during the drying process 9 »Device according to claims 5-8, characterized by a compensation and Reserve water tank (9) in the cooling water circuit of the device. - 12 - 10 »Device according to claims 5 to 9, characterized by a hood (8) over the water storage tank (4) with outlet nozzle (H) for the cleaned exhaust air, 11 *. Device according to claim 10, characterized through a cleaning filter on the outlet port (14). 12 · Device according to claim. 11, marked through a cleaning filter with active carbon, 13 · Device according to claim 10, characterized through a plastic hood (8), 14. Device according to claims 5-13, ge indicates through a water storage tank (4) with a double bottom and guidance of the exhaust air line (2) in the upper water-filled part in front of the final Confluence below the water level (5) in several turns with lower drainage pipe socket (16) -to the lower part ((6) of the container in which the condensate ized solvent is accumulated » 15. Device according to. Claim 14 »marked by serpentine turns with vertical position of the straight pipe sections, which each extend between approximately the water level to the bottom of the container (4). - 13 - 16 «devices according to claims 14 and 15, characterized by one in each two container spaces (4 and 6) arranged at the lowest point Drain cock (15 and 16). 17 · Device according to claims 5-16, characterized by cooling water pipes with cooling coils or heat sinks to maintain the desired cooling water temperature.