DE102005049609A1 - Environmentally friendly cleaning process - Google Patents

Abstract

Environmentally friendly cleaning method, wherein an object to be cleaned is cleaned in a cleaning chamber with a cleaning agent containing an emulsion having a pH of 6 to 11 and an emulsifier with an HLB of 7 to 18, wherein the dirty cleaning solution, cleaned by a ceramic filter, runs back into the storage container.

Description

The The invention relates to a cleaning method and a cleaning device.

cleaning process are known, especially for Components or parts of machines containing oils, fats, paper dust, algae, Yeasts, bacteria, fungi are polluted.

all common cleaning methods have in common is that they have large quantities Require detergents containing surfactants or solvents that difficult to dispose of and fleeting are, so special health and safety measures or measures for the Explosion protection is required.

task The invention is to improve the prior art and in particular a cleaning method and a cleaning device available put that without big ones Amounts of cleaning agent gets along, especially not volatile are.

object The invention is an environmentally friendly cleaning method, wherein an object to be cleaned in a cleaning chamber with a Cleaning agent containing an emulsion having a pH of 6 to 11 and an emulsifier having an HLB value of 7 to 18, from a storage container is cleaned, with the soiled cleaning solution through a ceramic filter cleaned runs back into the reservoir.

The environmentally friendly according to the invention Cleaning process can be done on a small scale, ie for cleaning of soiled, dirty parts such as pressure rollers, screws etc. in a cleaning chamber, wherein the cleaning chamber or which can also be a laundry hall to large soiled machine parts, such as. Ship units, Baumschinenteile etc. to clean, be carried out.

The environmentally friendly according to the invention Cleaning process can by means of a discharge device, in the it is preferably a device based on Gravity works, a pump or preferably a high-pressure radiator is clean detergent from a filtrate and clean container, the Reservoir brought and preferably with a working pressure between 0 to 80 bar, preferably 20 and 80 bar injected onto the parts to be cleaned. For this purpose is preferably a lance, as is usual with steam radiators, either manually or automatically introduced into the cleaning chamber. The cleaning may preferably be at 20 ° C up to 80 ° C take place, preferably 20 ° C. up to 60 ° C, most preferably 40 ° C up to 60 ° C, most preferably without exposure to temperature at room temperature 20 ° C cleaned becomes.

The Contains cleaning agent in addition to water 2 to 50 wt.%, Preferably 50 wt.%, Particularly preferably 5 to 10% by weight, preferably an emulsion, which is a O / W emulsion, preferably a microemulsion, i. the size of the distributed droplet is here in the colloidal range (10-50 nm).

The Emulsion has a pH of preferably 6 to 11, preferably 9 to 11 and more preferably 10 to 11 on.

As emulsifiers, preference is given to using those having an HLB value of 7 to 18, preferably 7 to 14, particularly preferably 8 to 13, very particularly preferably 8 to 12. These emulsifiers are preferably emulsifiers based on fatty alcohols having 6 to 22 carbon atoms, preferably 6 to 16 carbon atoms, such as alcohol formula 1-hexanol (caproic alcohol) C6H140 1-heptanol (oenanthalcohol) C7H160 1-octanol (caprylic alcohol) C8H180 1-nonanol (pelargon alcohol) C9H200 1-decanol (capric alcohol) C10H220 1-Undecanol C11H240 10-undecene-1-ol C11H220 1-dodecanol (lauryl alcohol) C12H260 1-tridecanol C13H280 1-tetradecanol (myristyl alcohol) C14H300 1-pentadecanol C15H320 1-hexadecanol (cetyl alcohol) C16H340 1-heptadecanol C17H360 1-octadecanol (stearyl alcohol) C18H380 9-cis-octadecen-1-ol (oleyl alcohol) C18H360 9-trans-octadecen-1-ol (erucyl alcohol) C18H360 9-cis-octadecene-1,12-diol (ricinoleic alcohol) C18H3602 all-cis-9,12-octadecadien-1-ol (linoleyl alcohol) C18H340 all-cis-9,12,15-octadecatrien-1-ol (linolenyl alcohol) C18H320 1-nonadecanol C19H400 1-eicosanol (arachidyl alcohol) C20H420 9-cis-eicosen-1-ol (gadoleyl alcohol) C20H400 5,8,11,14-Eicosatetraen-1-ol C20H340 1-heneicosanol C21H440 1-docosanol (behenyl alcohol) C22H460 1-3-cis-docosen-1-ol (erucyl alcohol) C22H440 1-3-trans-docosen-1-ol (brassidyl alcohol) C22H440 preferably alkoxylated fatty alcohols, particularly preferably ethoxylated fatty alcohols, very particularly preferred are emulsifiers based on 2-ethylhexanol, tridecanol, decanol or emulsifiers based on fatty acids having 8 to 22 carbon atoms, preferably having 12 to 16 carbon atoms, such as Acid C Formula R-COOH Capron-6 C5H11 Önanth-7 C6H13 Caprylic 8 C7H15 Pelargon-9 C8H17 Capric 10 C9H19 Undecane-11 C10H21 Laurin-12 C11H23 Tridecane-13 C12H25 Myristic 14 C13H27 Pentadecane-15 C14H29 Palmitic 16 C15H31 Margarin-17 C16H33 Stearin 18 C17H35 Nonadecane-19 C18H37 Arachidic 20 C19H39 Behen-22 C21H43 Palmitoleic 16 C15H29 Oil-18 C17H33 Erucic 22 C21H41 Sorbic 6 C5H7 Linoleic 18 C17H31 Linolenic 18 C17H29 Elaeostearin-18 C17H29 Arachidonic 20 C19H31 Clupanodon-22 C21H33 particularly preferred are alkoxylated fatty acids, most preferably ethoxylated fatty acids, very particularly preferred are emulsifiers based on stearic acid, lauric acid, myristic acid, palmitic acid.

Also preferred are polyoxyethylene sorbitan fatty acid esters

Fatty alcohol ethers of polyoxyethylene

Of the Emulsifier is preferably in amounts of 7 to 25 wt.%, Preferably from 15 to 20 wt.%, Particularly preferably from 7 to 15 based on contain the entire emulsion.

Of Further contains the emulsion preferably corrosion inhibitors, preferably tolyltriazole, Benzotriazole, more preferably N-oleoyl sarcosinic acid, alkyl ether carboxylic acid. Of the Corrosion inhibitor is preferably in amounts of 1 to 5 wt.%. or parts by weight, preferably from 2 to 3, more preferably from 0.5 to 1 based on the total emulsion.

Preferably can also preservatives, such as preferably preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate be. The preservatives are preferably in amounts of 0.1 to 1 wt.%, Preferably from 0.01 to 0.1 based on the total Emulsion included.

Of Further can also defoamer based on polyphosphate and silicone or a Mineralölentschämer included be. The defoamer is preferably in amounts of 0.1 to 5 wt.%, Preferably from 1 to 3, more preferably from 0.1 to 1.0 based on the total Emulsion included.

In addition, can still as humectant or lubricant preferably glycerol or diglycerol.

The Humectants glycerol or diglycerol is preferably in amounts from 1 to 30% by weight, preferably from 10 to 25% by weight, more preferably from 25 to 30 wt.% Based on the total emulsion.

Preferably the emulsion has a vapor pressure of substantially less than 26 mbar, preferably below 23 mbar, particularly preferably 10 mbar, in particular more preferably below 5 mbar, very particularly preferably below 0.1 mbar at 20 ° C on.

at The environmentally friendly cleaning method is the cleaning agent by a filter, preferably a ceramic filter whose pore diameter preferably not larger than 0.4 μm, is preferably 0.1-0.2 μm, directed.

Preferably The polluted cleaning agent is pressurized from 2 to 12 bar, preferably 6 to 8 bar, more preferably 5 to 6 bar by pressed the ceramic filter.

at a preferred embodiment, with a template of preferably only 10 1 detergent, the soiled one is running Material from the cleaning chamber into the crossflow filtration. By the channels the ceramic filter is the detergent to be filtered with an amount preferably of 5,000-12,000 liters / hour at one Pressure is preferably between 5 and 10 bar. Much of the through The ceramic filter running material flows back into the primary circuit in the working container.

The filtered material, which is color, any kind of dirt and oil residues is free, runs in the reservoir for fresh material. From there, it is returned to the cleaning process.

In order to prevent filter wear, the installed filters are backwashed by a microprocessor in countercurrent, ie from the clean side to the dirty side. This backwashing can be carried out with a gas, preferably air or a liquid, preferably the cleaning agent. This backwashing preferably takes a few seconds, so that the performance of the filtration unit is not adversely affected. In a preferred embodiment, depending on the number of filter rods and a preferred filter area of preferably not more than 1 m ^2, an automatic filtration capacity of preferably up to 100 liters / hour is ensured.

After the cleaning process in the preferred embodiment is completed in less than 5 minutes and the performance of the high-pressure cleaner at preferably max. 100-150 liters / hour, the filtration performance of the cleaning device according to the invention is usually determined with a filter area of preferably 0.4 m ² . This filter surface is sufficient to quantitatively filter out the existing amount of dirt.

In the purification process according to the invention, the yield of the filtration is preferably more than 96%, but preferably 98-99%. The dirt accumulates in the cleaning chamber. After egg An enrichment of approx. 30-40% by weight of contaminated cleaning agent must be emptied of the cleaning chamber and the contaminated cleaning agent concentrate must be destroyed as special waste.

There while the filtration probably also the detergency of the detergent, which is preferably 5-10% pure with water is used, is reduced, or cleaner shares accumulate in the dirt of the cleaning chamber, it is necessary to automatically nachzudosieren fresh detergent, which is the usual High-pressure radiators is unproblematic. Instead of the high-pressure radiator can also booster pumps can be used, which at the same working pressure as the high-pressure lamps work.

In the cleaning chamber and in the reservoir are preferably the Fill levels continuously over one freely programmable system specified and controlled. This can be necessary to overfill the container to avoid. To the ecological To meet requirements, the cleaning device is preferably in an over-tank, um if necessary, quantitatively absorb leaking material.

One Another object of the invention is a cleaning device, the one cleaning chamber for the Cleaning process, a reservoir for the clean cleaning fluid, contains the cleaning agents, a discharge device for the dirty cleaning agent from the cleaning chamber, at least a ceramic filter to clean the soiled detergent and a connection between the filter and the reservoir to return the cleaned detergent back to the storage tank.

The Cleaning device according to the invention has essentially two separate areas, depending on the size of the cleaning device are designed, and herein called cleaning chamber and reservoir become. The cleaning chamber is cleaned manually or automatically and in the reservoir depending on the size of the plant presented detergent, which has been described above, starting at preferably about 10 liters for a smaller cleaning device and that cleaned from the cleaning chamber, So recycled detergent, kept for cleaning available.

From the reservoir is clean detergent by means of a discharge device, which may preferably be a device which due to gravity works, a pump or preferred a high-pressure radiator, introduced and preferably with a Working pressure between 0 to 80 bar, preferably 1 to 8, especially preferably 20 and 80 bar placed on the parts to be cleaned. For this purpose is preferably a lance, as is usual with steam radiators, either manually or automatically introduced into the cleaning chamber.

The Dirty detergent is removed from the cleaning chamber at least one filter, it could also two, three, four five, six etc. filters, depending on size, be preferably a ceramic filter whose pore diameter is preferably not bigger than 0.4 μm, preferably at 0.1 to 0.2 microns lies, guided. This is preferably done in the form of cross-flow filtration.

Preferably The polluted cleaning agent is pressurized from 2 to 12 bar, preferably 6 to 8 bar, more preferably 5 to 6 bar by pressed the ceramic filter.

This Filter is preferably cleaned by a countercurrent device. This can be done manually or automatically controlled. there can preferably be a gas, preferably blown through air or a liquid, preferably the cleaning agent, be pumped in reverse.

in the Continuous operation, it may be useful, the cleaning device according to the invention with an additional heat exchangers equip, thus excessive heating of the to be cleaned liquid omitted.

Preferably is the cleaning device according to the invention while the cleaning is closed.

1 shows a preferred embodiment of the cleaning device according to the invention.

DESCRIPTION OF COMPONENTS

• AT01: Cleaning chamber approx. 3001, integrated in the washing container, collecting tank for soiled cleaning medium
• FT02: Reservoir approx. 3001, integrated in the cleaning device, storage container for filtered clean cleaning water
• FE031, FE032: Ceramic filter rod in module housing
• HKH01: Shut-off hand ball valve Drain cleaning chamber AT01, Inlet pump P01 for Transportation, service
• HKH02: Shut-off hand ball valve Drain after pump P01 for draining the cleaning chamber AT01
• HKH03: Hand ball valve Drain ceramic filter FE02 ball valve for adjusting the working pressure in the filter units
• HKH04: Shut-off hand ball valve Drain filtrate line for sampling of the filtered detergent
• HKH05: Shut-off hand ball valve Drain after pump P02 for draining of the storage container FT02
• AV01: Automatic shut-off valve Drain filtrate line To the Blocking the filtrate in the backwash cycle
• PF01: Multi-stage centrifugal pump Main filtration pump frequency converter operated
• MM01: pressure gauge Inlet filter unit FE01 monitoring and adjusting the filter inlet pressure
• MM02: pressure gauge Drain filter unit FE02 monitoring and adjusting the filter outlet pressure
• RE01: backwash unit procedure filtrate For backwashing the ceramic filter

The Cleaning chamber AT01 has a cock HKH01, with which the dirty water by means of a pump PF01 through at least the ceramic filter FE031 depressed being, being over the stopcock HKH02 the cleaning chamber, if necessary, too Completely can be emptied. The dirty water is at least through the Filter module FE031 pressed and then, if necessary, through the further filter module FE032 depressed if the dirty water is particularly dirty then ultimately in the reservoir To get to FT02. By means of the ball valve HKH03 can preferably the working pressure in the filter unit can be adjusted. If the Flushed filter in countercurrent should be closed, the stopcock AV01 to by means of the backwash unit RE01 to rinse the ceramic filter. On the Stopcock HKH04 can be a sample of the filtered detergent be removed. Furthermore, you can still Pressure gauge MM01 and MM02 (not shown) in the inlet of each Filter unit FE01 and FE02 for monitoring and adjusting the filter outlet pressure. On the Stopcock HKH05 can clean detergent by means of the pump P02 to use it for cleaning or to the reservoir Drain.

advantage of the purification process according to the invention and the cleaning device according to the invention is that surprising in a very short time a very good cleaning result can be achieved and at the same time Very little detergent needs to be used as it keeps coming back is recycled and only very few detergents are replaced got to.

Examples

example 1

In 700 g of water are
20 g sodium hydroxide lozenges dissolved.

It a pH of about 10, 5 is established.

Then be 200 g of ethoxylated fatty alcohol dissolved with an HLB value of 12. Of Further, 10 g of corrosion inhibitor N-oleoylsarcosinic acid are supplied.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 2

In 600 g of water
Dissolved 30 g of sodium metasilicate crystalline (5 moles of water).

It a pH of about 10 sets.

Then be 200 g of ethoxylated fatty alcohol dissolved with an HLB value of 12. Of Further, 10 g of corrosion inhibitor N-oleoylsarcosinic acid are supplied.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 3

In 600 g of water
20 g sodium hydroxide lozenges dissolved.

It a pH of about 11 sets.

Then be 200 g ethoxylated fatty alcohol with an HLB value of 8-10 dissolved. Of Further, 10 g of corrosion inhibitor N-oleoylsarcosinic acid are supplied.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 4

Be in 500 g of water
17 g of sodium hydroxide lozenges dissolved.

It a pH of about 11 sets

Then be 200 g of auxiliary solvent of the type glycerol or diglycerin and 100 g ethoxylated fatty acid with an HLB value of 8-10 solved. Furthermore, 10 g of corrosion inhibitor N-oleoylsarcosinsäure are supplied.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 5

Be in 500 g of water
17 g of sodium hydroxide lozenges dissolved.

It a pH of about 11 sets

Then be 200 g of auxiliary solvent of the type glycerol or diglycerin and 100 g ethoxylated fatty acid with an HLB value of 8-10 solved. Furthermore, 10 g of alkyl ether carboxylic acid as a corrosion inhibitor fed.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 6

Be in 500 g of water
17 g of sodium hydroxide lozenges dissolved.

It a pH of about 11 sets

Then be 200 g of auxiliary solvent of the glycerin or diglycerin type and 100 g of ethoxylated fatty alcohol with an HLB value solved by 12. Furthermore, 10 g of alkyl ether carboxylic acid as a corrosion inhibitor fed.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 7

Be in 500 g of water
17 g of sodium hydroxide lozenges dissolved.

It a pH of about 11 sets

Then be 200 g of auxiliary solvent of the type glycerol or diglycerin and 100 g ethoxylated fatty acid with an HLB value of 12 and in addition Dissolved 50 g of diethyl sulfosuccinate. Furthermore, 10 g of alkyl ether carboxylic acid as a corrosion inhibitor fed.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Example 8

Be in 500 g of water
17 g of sodium hydroxide lozenges dissolved.

It a pH of about 11 sets

Then be 200 g of auxiliary solvent of the type glycerol or diglycerol and 150 g of ethoxylated fatty acid with an HLB value of 10 and in addition Dissolved 50 g of dialkyl sulfosuccinate. Furthermore, 10 g of alkyl ether carboxylic acid as a corrosion inhibitor fed.

In The result is added to 30 g of polyphosphate type Calgon and defoamed the entire mixture with a silicone or mineral oil defoamer. For this 2 g are needed.

to Prevention of germination will be 0.5 g preservative concentrate based on 1,2-benzoisothiazolin-3-one and sodium o-phenylphenolate added.

Claims (14)

Environmentally friendly cleaning method, wherein an object to be cleaned in a cleaning chamber with a Cleaning agent containing an emulsion having a pH of 6 to 11 and an emulsifier having an HLB value of 7 to 18, from a storage container is cleaned, with the soiled cleaning solution through a ceramic filter cleaned runs back into the reservoir. Environmentally friendly cleaning method according to claim 1, characterized in that the emulsion is a microemulsion. Environmentally friendly cleaning method according to claim 1 or 2, characterized in that the emulsion has a vapor pressure of substantially below 0.1 mbar at 20 ° C. Environmentally friendly cleaning method after one or more of the claims 1 to 3, characterized in that cleaning agent by a Ceramic filter whose pore diameter is not greater than 0.4 microns, passed becomes. Environmentally friendly cleaning method after one or more of the claims 1 to 4, characterized in that the soiled cleaning agent is pressed through the ceramic filter at a pressure of 2 to 12 bar. Environmentally friendly cleaning method after one or more of the claims 1 to 5, characterized in that the ceramic filter by a Countercurrent is cleaned. Environmentally friendly cleaning method after one or more of the claims 1 to 6, characterized in that the temperature of the cleaning agent 20 ° C to 80 ° C, preferably 20 ° C to 60 ° C, especially preferably 40 ° C up to 60 ° C, most preferably at 20 ° C is. Cleaning device, which is a cleaning chamber for the Cleaning process, a reservoir for the clean cleaning fluid, contains the cleaning agents, a discharge device for the dirty cleaning agent from the cleaning chamber, at least a ceramic filter to clean the soiled detergent and a connection between the filter and the reservoir to return the cleaned detergent back to the storage tank. Cleaning device according to claim 8, characterized in that that the pore diameter of the ceramic filter is not greater than 0.4 μm. Cleaning device according to claim 8 or 9, characterized characterized in that it is a countercurrent device for cleaning having the ceramic filter. Cleaning device according to one or more of claims 8 to 10, characterized in that the cleaning agent a Emulsion having a pH of 6 to 11 and an emulsifier having an HLB value of 7 to 18. Cleaning device according to one or more of claims 8 to 11, characterized in that the emulsion in the detergent is a microemulsion. Cleaning device according to one or more of claims 8 to 12, characterized in that the emulsion in the detergent is contained, a vapor pressure of substantially less than 0.1 mbar at 20 ° C having. Cleaning device according to one or more of claims 8 to 13, characterized in that the temperature of the cleaning agent 20 ° C to 80 ° C, preferred 20 ° C to 60 ° C, especially preferably 40 ° C up to 60 ° C is.