Method and apparatus for dry chemical cleaning of articles with the use of siloxane solvent (versions)

FIELD: method and equipment for dry chemical cleaning of articles through utilization of siloxane solvents.

SUBSTANCE: apparatus has cleaning drum for receiving of articles and at least one tank containing siloxane solvent. Pump for dipping of articles into drum containing siloxane solvent is connected between tank and cleaning drum. Distiller is used for distilling of contaminated siloxane solvent in order to provide pure siloxane solvent. Condenser is connected to cleaning drum and/or distiller for regeneration of condensed vapors. Separator is connected to condenser for separating water from siloxane solvent, said separation of water from siloxane solvent in condensed mixture is provided by gravity. Fan is connected to cleaning drum for circulating air along condenser and heating spirals into cleaning drum for drying and cooling of articles.

EFFECT: increased efficiency in cleaning of articles, and improved ecology control owing to utilization of siloxane solvent harmless for human health and for environment.

23 cl, 4 dwg

 

The present invention in General relates to the field of dry chemical cleaning clothes, textiles, fabrics and the like and, more specifically, relates to a method and installation for dry chemical cleaning using a siloxane solvent.

Dry chemical cleaning is the most important industry in the world. In the USA alone there are more than forty thousand dry dry (located in many places). The dry cleaning industry is a significant sector of the modern economy. A large number of items of clothing (and other items) require dry cleaning to ensure that they remained in a pure form without the fat and oil stains, kept presentable and this did not sit down and not discolor.

The most widely used cleaning solvent still was perchlorethylene. It has many shortcomings, including its inherent toxicity and odor.

Another problem in this area is that different fabrics require different treatment in the currently existing systems, in order to prevent tissue damage during dry chemical cleaning.

How dry chemical cleaning prior art include the use of different solvents with the appropriate equipment, performing cleaning. As the UE is was minalas earlier, the most commonly used solvent was perchlorethylene. The advantage of perchloroethylene is that he is a good cleaning solvent, but its disadvantage is that it represents a serious threat to health and the environment, i.e. many forms of cancer are associated with him, and he is an extremely destructive effect on ground water and aquatic flora. In some parts of perchlorethylene is prohibited due to these shortcomings. In addition, in the past have been tried and used other solvents such as petroleum solvents or hydrocarbon solvents. These various solvents less aggressive than perchlorethylene, but still classified as volatile organic compounds. As such, such compounds are monitored, and their use is allowed by many atmospheric zones.

Industry dry chemical cleaning for a long time was based on the use of solvents, oil-based and well-known chlorinated hydrocarbons, perchloroethylene and trichloroethylene, are used for cleaning fabrics and garments. From 1940-ies perchlorethylene was regarded as a synthetic compound, which is not flammable and has excellent degreasing and cleaning properties, ideal for industry dry chemical cleaning is. Since the 1970s, it was discovered that the perchloroethylene causes liver cancer in animals. It was a disturbing discovery, since waste from dry cleaning at that time went into the pits for waste and landfills, where they were washed into the soil and groundwater.

Rules protection Agency U.S. environmental gradually became more strict and ended with the law, which was introduced in 1996 and demanded dry dry-cleaning cycles "from dry to dry", which meant that fabric and garments arrive in the equipment dry and leave it dry. This required the development of systems with "closed loop", which can be recaptured almost all of perchlorethylene, in liquid or vapor state. Process "cycle" includes the location of fabrics or garments in a washing machine of special design, which can accommodate from 15 to 150 pounds of fabrics or garments that can be seen through a round window. Before they are placed in the machine, fabrics or garments are checked for spots and places manually processed by the remover. If the fabric is unusual or if you know that it can create trouble, checked the label, certifying that the manufacturer considers dry chemical cleaning is safe for the product. If not, the stain can ostatic is. For example, spot sugar may be invisible, but after going through the process of dry cleaning it oxidizes and turns brown. If the stain is fat, water will not help, but will help the solvent because it dissolves the fat. Actually the main reason that some kinds of clothes cleaned, dry chemical cleaning (which should not be washed in a standard washing machine) is the removal of deposited fats (known as fatty acids), as they also are oxidized and form a rancid odor.

Fat and fatty acids, which accumulate in the solvent are removed by filtration and distillation of the solvent. In other words, the dirty solvent is boiled, and all pairs are condensed through the condensing coil back into the liquid. The recovered liquid is comprised of both solvent and water, and the liquid is then passed through a separator to separate two immiscible liquids. Water can be obtained from the natural humidity of the ambient air, having access to textiles before cleaning. Another source of moisture can be the materials used for pre-remove stains.

Before removing the textile from the car washing machine becomes dryer. Through the chamber is purged with hot air, but the air current is not given out, and prob is the CIO through the condenser, which condenses the vapor in the liquid. The liquid then passes through a separator to remove water from the solvent and returning the solvent for reuse.

Despite the development of these different forms of plants for dry chemical cleaning with solvents, such as perchloroethylene, petroleum solvents and hydrocarbon solvents, none of them have been specifically designed for use with composition-based siloxane.

Known, for example, installation of dry chemical cleaning products, which contains a cleaning drum for location of items, the tank containing the solvent, a pump connected between the reservoir and the cleaning drum to pump solvent in the cleaning drum, a fan connected to the cleaning drum for air circulation along the heater in the cleaning drum for drying products, condenser, receiving water vapor from the cleaning drum and forming a condensed mixture of water and solvent, and a separator connected to the condenser for separating water from the solvent, the distiller, the receiving solvent from the cleaning drum, a condenser receiving vapors of solvent and water from the distiller, and a filter receiving the solvent from the cleaning drum (see U.S. patent 4712392).

In this installation is realized pic is b dry chemical cleaning products, includes the following stages: dipping in a solvent in the cleaning drum; removing at least part of the solvent from the cleaning drum; drying products and removal of the drum vaporous mixture containing vapors of solvent and water vapor; condensing the vaporous mixture to obtain a condensed mixture of water and solvent and separating water from the solvent in the water separator.

The technical result of the present invention is to provide a setting and method for dry chemical cleaning products using siloxane solvent, providing effective cleaning products which are harmless to human health and the environment.

This technical result is achieved by the fact that the installation of dry chemical cleaning products contains a cleaning drum for location of items, the tank containing siloxane solvent, a pump connected between the reservoir and the cleaning drum to pump siloxane solvent in the cleaning drum, a fan connected to the cleaning drum for air circulation along the heating element in the cleaning drum for drying products, condenser, receiving water vapor and silicon vapors from the cleaning drum and forming a condensed mixture of water and siloxane solvent separator, under the United States to the condenser for separating water from siloxane solvent in the condensed mixture by gravity.

The installation may further optionally contain a distiller connected to the cleaning drum to distillation siloxane solvent from the cleaning drum.

The installation may further comprise a second capacitor connected to the distiller and the separator and is designed for condensing water vapor and siloxane vapor from distillation to obtain a condensed mixture of water and siloxane solvent.

The installation may further comprise a source of vacuum connected to the distiller to create a vacuum therein, extracting from the distiller siloxane solvent.

In setting the temperature of saturated steam of air from the cleaning drum may be in the range of from 120 to 138 degrees Fahrenheit.

In the installation of recirculating air flowing into the cleaning drum can be maintained at a temperature of from 120 to 180 degrees Fahrenheit.

The installation may further comprise a tank for recovered siloxane solvent, coupled with the separator.

The installation may further comprise a filter connected to the cleaning drum to pass through it siloxane solvent in the cleaning drum. The filter can be made in the form of a cartridge.

The installation may further comprise coalescence means is a, connected to the separator for the passage of the condensed mixture through coalescence means before entering the separator. Coalescence means may contain a phenol-formaldehyde polymer with open cells.

The installation may further comprise a filter and a distiller, host siloxane solvent from the cleaning drum. The distiller can take siloxane solvent from the filter.

This technical result is achieved by the fact that the installation of dry chemical cleaning products using siloxane solvent without additional volatile organic cleaning solvents contains a cleaning drum for location of items, the tank containing siloxane solvent, a pump connected between the reservoir and the cleaning drum to pump siloxane solvent in the cleaning drum, a fan connected to the cleaning drum for air circulation along the heating element in the cleaning drum for drying products, filter or distiller, host siloxane solvent from the cleaning drum, a condenser receiving water vapour and siloxane pair of filter or distiller, and forming a condensed the mixture of water and siloxane solvent separator, connected to the condenser for separating water from siloxa the new solvent in the condensed mixture by gravity.

The filter can be made in the form of a cartridge.

The installation may contain a filter, receiving siloxane solvent from the cleaning drum, and the distiller, the host siloxane solvent from the filter.

This technical result is achieved by the fact that the way dry chemical cleaning products includes the following stages:

dipping in siloxane solvent in the cleaning drum;

removing at least part of the siloxane solvent from the cleaning drum;

drying products and removing vaporous mixture containing siloxane vapours and water vapours from the cleaning drum;

the condensation of the vaporous mixture to obtain a condensed mixture of water and siloxane solvent and the separation of water from the siloxane solvent in the condensed mixture by gravity.

Drying products can be made by the circulation of heated air over the products.

The method may further comprise re-use condensed and separated siloxane solvent for cleaning other products in the cleaning drum.

The method may further comprise distillation siloxane solvent, remote from the cleaning drum.

The method may further comprise the condensation of siloxane vapor obtained in distillate is.

The method may further comprise passing the condensed vaporous mixture through coalescence tools.

The above-mentioned advantages of the present invention, as well as additional objectives and advantages will become clearer from the detailed description of preferred embodiments with reference to the accompanying drawings, which depict the following:

figure 1 is a schematic depiction of the setup for dry chemical cleaning, which is used with a solvent having a boiling point for which you want to vacuum distillation;

figure 2 is a sequence diagram of stages of a method of dry chemical cleaning according to one implementation variant of the present invention;

figure 3 is a sequence diagram of stages of a method of separating water from the solvent;

figure 4 is a schematic depiction of the mechanism used for the separation of water from the solvent in which the density is very close, as shown in figure 3.

The present invention includes installation and method for dry cleaning of fabrics, textile products, leather and so on

To perform interrelated stages of cleaning according to the present invention is used to install 5 for dry chemical cleaning, schematically shown in figure 1, although it is clear that m is able to be used for alternative cleaning installations. It should be noted that the installation 5 figure 1 can be used for processing with solvent type Class 3-A.

Dry clean clothing or other products begins with the fact that they are placed in a horizontal rotating cleaning the drum of the unit 5. The cleaning cycle begins with the injection pump 12 fluid for dry chemical cleaning, comprising siloxane solvent-based organosilicon. The solvent is pumped from the working tank 14 and reservoir 16 for the new solvent in the drum 10 with its products. The injected solvent may be routed through the filter 18 or directly in the cleaning drum 10.

From the drum 10, the solvent is circulated through the collector 20 of the buttons to the pump 12. After stirring for a predetermined period of time, the solvent is drained and pumped into one of three bins 14, 16, 22 (figure 1). The drum 10 is then rotated under the influence of centrifugal forces to drain the remaining solvent in any of the tanks, where it is required.

Types of filtration systems that are compatible with the specific solvent according to the present invention, the following: the rotation disc type size of 20-30 microns, with a rotation disc 30 microns can be used diatomaceous earth; a tubular filtering (flexible, rigid or shock), which also can polybore be used diatomaceous earth; cartridge filter (carbon rod, entirely carbon or standard size, large size, split type) and system cartridge Kleen Rite that does not require the distiller. Can be used as filters ranging in size from 10 to 100 microns for filtering the condensed vapors before the separator.

The solvent may be filtered to eliminate particles of the earth, which are separated from the purified products. In addition, filtering, solvent-based silicone eliminates the polymerization solvent even in the presence of catalysts.

Used for cleaning solvent should perekanatisya with a flow rate of 10 to 20 gallons per hundred pounds of purified material, if you are not using the system Kleen Rite. This can be used distiller 24, the receiving solvent from the filter 18 or reservoir 22 for dirty solvent. The solvent in the reservoir 22 may be injected into the distiller suction, so as distillation under vacuum, controlled by a float ball valve (not shown).

All recovered or condensed vapors leaving the distillation can condense water cooled condenser coils 26 vapors of distillation. Then under the action of gravity condensed solvent into the separator 28. The flow rate depending is from the distiller may be from 0.75 to 1.25 gallons per minute, and accordingly designed the separator. The vacuum can be created Gidrostroy pump 30 or vacuum at the Venturi principle.

During drying of the product roll in the drum 10 by means of the air blowing fan 32 over the heating elements made in the form of coils 34, resulting in a stream of air enters at a temperature in the range from 120 to 180 degrees Fahrenheit. As the remaining products of the solvent and the water is heated and becomes steam, there is air flow in the drum 10, which passes over the cooling coils of the condenser 36 vapor drying, where the pair again condense into a liquid. Under the action of gravity the liquid enters the separator 28 through the pipe 37.

Saturated steam air discharged from the cleaning drum 10 has a temperature in the range of from 120 to 138 degrees Fahrenheit. This temperature is significant, as it is 30 degrees Fahrenheit, or more, below the ignition temperature of the specified solvent. In one implementation, the flow rate of the condensed liquid may be limited to 0.75 gallons per minute, and thus the separator can be designed for the combined flow rate of the condensed liquid from the distiller and capacitors 26, 36 vapor drying.

Figure 2 shows the order in which could the t to use the various components of the present invention for cleaning. As will be apparent from the following description of the method of dry cleaning, there is at least one, namely two or more sources of solvent separator. The ability to return again condensed solvent in the installation of dry chemical cleaning depends on the separator 28 and its effectiveness. To achieve such efficiency used method of separation of water and solvent, as shown in figure 3. As shown, at stage 40, the liquid mixture to the dry chemical cleaning and water is removed from the workpieces during dry chemical cleaning. Then the mixture enters the separator 28 at the stage 42. After receipt of fluid is directed through coalescence means, as shown at stage 44. The liquid then dry chemical cleaning is separated from the water phase 46.

Figure 4 is a schematic depiction of the separator 28 of one embodiments of the present invention implementing the method illustrated by figure 3. When the flow of hydrated solvent or a mixture of water and liquid for dry cleaning approaches the main chamber 48 of the separator 28, the mixture may be filtered to prevent entry into the separator 28 of the particles of the earth and down, which can affect coalescent filter below. For such coalescence filtration means 56 can be placed the us in the first end of the inlet pipe 52. Different coalescence means of the present invention may include nylon or any other similar means. Connection vertically from the vapor condensers 26, 36 installation 5 for dry chemical cleaning of figure 1 may be mounted on a plumb so that there will be in-depth places where it can accumulate water. Thus there can be provided the most direct access to the separator 28.

Hydrated solvent is included in the separator 28 at the point 50, where under the action of gravity it passes down through the inlet pipe 52, which ends at a distance of several inches above the level surface 54 of the partition between water and liquid for dry chemical cleaning. The solvent-based silicone water-insoluble, but water in the form of micelles present in hydrated solvent, until they form balls with a diameter of 0.015 cm because Of the formed joint mass of the beads settle to the bottom of the main chamber 48. Hydrated solvent flows in the horizontal direction from the horizontal ends 55 of the inlet pipe 52 to reduce the turbulence.

When all the liquid in the main chamber 48 rises, float switches level 58 is released, which in turn drives a submersible pump 60 having a capacity of 400 gallons per hour. This pump 60 draws hydrated solvent from a level of from /3 to 1/2 of the total height of the main chamber 48. The liquid is then pumped by pump 60 into the housing 62 of the filter, which has a vertical cavity size from 2 to 20 inches.

Hydrated solvent is then passed or force enjoys through coalescence means 64 located inside the housing 62 of the filter. These funds have from 2 to 12 inches in diameter and cross-section of from 1/4 to 4 inches. It should be noted that the vertical cavity of the housing 62 of the filter can be located from three or more separate means 64. The configuration of a phenol-formaldehyde polymer (PEP) with open cells that can be used to ensure coalescence means 64, allows you to connect water micelles. Some water balloons formed when hydrated solvent is passed through coalescence means 64, and appear on the output side of the means 64.

The pump 60 may be electric or pneumatic. The use of any means of flow control, such as pump 60 or, alternatively, vacuum, provides sufficient separation. A means of flow control must provide a stream of from 0.5 to 2.5 gallons per minute. If the flow of hydrated solvent more than they can afford coalescence means 64, float switches level 58, which actuates a means of flow control, can set the below to recover, to give more buffer space for hydrated solvent.

When the separated liquid exits the filter housing 62, it is in a vertical pipe 66 in the other chamber 68 that allows the water to the beads to settle to the bottom. The separated solvent flows from the outlet 69 of solvent.

Water beads are collected at the bottom of the chamber 68, flow under the action of gravity water through a pipe 70 to the bottom of the main chamber 48. In one embodiment of the invention the pipe 70 has an internal diameter ranging from 1/8 to 1/4 inch. Water collecting on the bottom of the main chamber 48, is removed using float switches 72 levels, which mechanically opens the hinged valve 74. There is also the option to use two points of conductivity or sensors (not shown), which create a contact as lifting water to complete the signal path, the input signal is either pneumatic or electric valve, which can drain the water in the main chamber 48. In addition, at the bottom of the main chamber 48 may be located a means to drain the fluid manual for periodic maintenance.

Main camera 48 may be made of stainless steel or polyethylene. Production of the main chamber 48 carbon steel is not suitable, taktak can occur quickly oxidation and rusting. Moreover, it is not advisable to use a system of pipes from Tigana, polyvinyl chloride and vinyl chloride as the solvent-based silicone will remove the plasticizer, making the material brittle. Can be used with other materials to which the solvent has no effect.

The use of solvent-based silicone makes possible the use of temperatures that are usually not allowed into the area dry chemical cleaning. The temperature control liquid solvents used in dry chemical cleaning is very important.

The most widely used solvent, as mentioned earlier, is perchlorethylene, the temperature is maintained in the range from 78 to 82 degrees Fahrenheit. This is the normal range for all other solvents, which are used in dry chemical cleaning. If the temperature increases, the solvent becomes more aggressive, which will lead to damage to the treated textiles. The magnitude of "Kari butyl often leads to the fact that the paint peeled from the processed products, resulting in this paint goes on other washable items. The need for temperature control have forced manufacturers of machines for dry chemical cleaning set is gladiali spiral in the main tank and built in water cooling jacket on vertical pipes for heat transfer.

The increase in the temperature of the solvent-based silicone according to the present invention to range from 90 to 130 degrees Fahrenheit can influence when cleaning the product, do not harm paints and without delamination. This is best achieved by circulation of water through a closed circuit between the tank with hot water through the circulation pump and spiral (used for cooling) and back into the tank for hot water. The circulation pump is regulated by the temperature sensor, which may be in the solvent. As a result, the temperature of the solvent is very accurately controlled, which affects the aggressiveness of the solvent, no harm processed products.

Although described herein various implementations of the invention, it is clear that they are only examples and not limiting of the invention. Thus, the breadth and scope of the preferred implementations of the invention should not be limited by any of the above examples, but should be determined accordingly the subsequent claims.

1. Installation for dry chemical cleaning products containing cleaning drum for location of items, the tank containing siloxane solvent, a pump connected between the reservoir and the cleaning drum to pump silo is Sanogo solvent in the cleaning drum, the fan connected to the cleaning drum for air circulation along the heating coil in the cleaning drum for drying products, condenser, receiving water vapor and silicon vapors from the cleaning drum and forming a condensed mixture of water and siloxane solvent separator, connected to the condenser for separating water from siloxane solvent in the condensed mixture by gravity.

2. Installation according to claim 1, additionally containing distiller connected to the cleaning drum to distillation siloxane solvent from the cleaning drum.

3. Installation according to claim 2, additionally containing a second capacitor connected to the distiller and the separator and is designed for condensing water vapor and siloxane vapor from distillation to obtain a condensed mixture of water and siloxane solvent.

4. Installation according to claim 2, additionally containing a source of vacuum connected to the distiller to create a vacuum therein, extracting from the distiller siloxane solvent.

5. Installation according to claim 1, in which the temperature of saturated steam of air from the cleaning drum is in the range from 120 to 138 degrees Fahrenheit.

6. Installation according to claim 1, in which the circulating air flowing into the cleaning drum is supported when the temperature from 120 to 180 degrees Fahrenheit.

7. Installation according to claim 1, additionally containing tank for recovered siloxane solvent, coupled with the separator.

8. Installation according to claim 1, additionally containing a filter connected to the cleaning drum to pass through it siloxane solvent in the cleaning drum.

9. Installation according to claim 8, in which the filter is made in the form of a cartridge.

10. Installation according to claim 1, additionally containing coalescence means connected to the separator for the passage of the condensed mixture through coalescence means before entering the separator.

11. Installation according to claim 10, in which coalescence products contain phenol-formaldehyde polymer with open cells.

12. Installation according to claim 1, additionally containing the filter and the distiller, the host siloxane solvent from the cleaning drum.

13. Installation according to item 12, in which the distiller is adapted to receive siloxane solvent from the filter.

14. Installation for dry chemical cleaning products using siloxane solvent without additional volatile organic cleaning solvents containing cleaning drum for location of items, the tank containing siloxane solvent, a pump connected between the reservoir and the cleaning drum to pump siloxane solvent in the cleaning drum, ve is tilator, connected to the cleaning drum for air circulation along the heating coil in the cleaning drum for drying products, filter or distiller, host siloxane solvent from the cleaning drum, a condenser receiving water vapor and silicon vapors from the cleaning drum or distiller, and forming a condensed mixture of water and siloxane solvent separator, connected to the condenser for separating water from siloxane solvent in the condensed mixture by gravity.

15. Installation 14 in which the filter is made in the form of a cartridge.

16. Installation 14, which contains a filter that accepts siloxane solvent from the cleaning drum, and the distiller, the host siloxane solvent from the filter.

17. Method dry chemical cleaning products containing the following steps: dipping in siloxane solvent in the cleaning drum; removing at least part of the siloxane solvent from the cleaning drum; drying products and removing vaporous mixture containing siloxane vapours and water vapours from the cleaning drum; the condensation of the vaporous mixture to obtain a condensed mixture of water and siloxane solvent and the separation of water from the siloxane solvent in the condensed mixture through with the crystals of gravity.

18. The method according to 17, in which the drying of the products is done by circulation of heated air over the products.

19. The method according to 17, which further comprises reusing condensed and separated siloxane solvent for cleaning other products in the cleaning drum.

20. The method according to 17, which further comprises a distillation siloxane solvent, remote from the cleaning drum.

21. The method according to claim 20, which further comprises a siloxane condensation of vapor, obtained by distillation.

22. The method according to 17, which further comprises passing the condensed vaporous mixture through coalescence tools.

23. The method according to 17, which further comprises filtering siloxane solvent, remote from the cleaning drum.



 

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FIELD: method and equipment for dry chemical cleaning of articles through utilization of siloxane solvents.

SUBSTANCE: apparatus has cleaning drum for receiving of articles and at least one tank containing siloxane solvent. Pump for dipping of articles into drum containing siloxane solvent is connected between tank and cleaning drum. Distiller is used for distilling of contaminated siloxane solvent in order to provide pure siloxane solvent. Condenser is connected to cleaning drum and/or distiller for regeneration of condensed vapors. Separator is connected to condenser for separating water from siloxane solvent, said separation of water from siloxane solvent in condensed mixture is provided by gravity. Fan is connected to cleaning drum for circulating air along condenser and heating spirals into cleaning drum for drying and cooling of articles.

EFFECT: increased efficiency in cleaning of articles, and improved ecology control owing to utilization of siloxane solvent harmless for human health and for environment.

23 cl, 4 dwg

FIELD: textile industry.

SUBSTANCE: device consists of a cleaning drum for arranging items therein and one or several tanks containing siloxane solvent. The pump for putting items into the drum filled with siloxane solvent is connected between the tank and the cleaning drum. Distiller is used for distilling dirty siloxane solvent in order to reduce clean siloxane solvent. Condenser is connected to the cleaning drum and/or the distiller in order to reduce condensed vapours. For draining all the water from siloxane solvent coming from the condenser, a separator is connected to the condenser. To the cleaning drum there connected is the fan providing air circulation along the condenser, heating coils, and to the cleaning drum for drying and cooling items.

EFFECT: developing the installation for dry chemical cleaning of items by using siloxane solvent, which provides effective cleaning of items by means of the method that is safe for people's health and environment.

32 cl, 4 dwg

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