FR2704780A1 - Cleaning process by micropulverization. - Google Patents

Abstract

The present method relates to a system of cleaning by microspraying false ceilings and walls and for any disinfecting or decontaminating operation and more generally any operation requiring the use of microspraying. The method is characterised by the additional use of chemical solutions exactly adapted to the type of cleaning and to the support in question and of a microspraying appliance equipped with an ultrafine nozzle, with the waste produced by the cleaning action being collected in particulate form in a tank. This method uses an assembly of three tanks, one containing compressed air, another a chemical solution adapted to the support to be cleaned, and the third for collecting the particulate waste produced by the cleaning action. The liquid is propelled by the pressure of the air contained in the first tank. The assembly constitutes a complete system which comprises an air tank, to fill which requires only three minutes of electrical energy for three hours of work, a range of highly volatile solutions which will not impregnate the support or modify its physical and chemical characteristics, and a system for collecting the waste produced by the cleaning action in the form of particles in a special tank. It employs a very small amount of cleaning solution owing to the fact that it sprays it onto the support at a pressure of 0.3 bar.

Description

MICRO-SPRAY CLEANING PROCESS

DESCRIPTION

  The present method relates to a cleaning system by micropulverization of false

  ceilings and walls as well as all disinfection and decontamination operations and more generally all operations requiring the use of micropulverization. The process is characterized by the joint use of chemical solutions perfectly suited to the type of cleaning and the support concerned and a micropulverization device equipped with an ultra-fine nozzle and which collects cleaning waste in the form of particles in a tank.

  specific in certain cases of sensitive environments.

  The cleaning operations in the field of the present process are traditionally carried out with devices fitted with a noisy compressor, consuming energy constantly, using liquid detergent products modifying the physical and chemical characteristics of the supports and requiring protection or removal of the

premises cleaned.

  The whole constitutes a complete system making it possible to remedy these drawbacks. According to a first characteristic, it has an air tank, the filling of which requires only 3 minutes of electrical energy for 3 hours of work. According to a second characteristic, it uses a set of very volatile solutions which do not permeate the support and do not modify the physical and chemical characteristics of the supports. According to a third characteristic, it collects the cleaning waste in the form of particles in a special tank. . According to a fourth characteristic, it uses a minimal amount of

  cleaning solution since it projects this onto the support at a pressure of 0.3 bars.

  This process uses a set of three tanks containing one of the pressurized air, the other a chemical solution adapted to the support to be cleaned, the third receives the particles of

cleaning waste.

  The "HYGIENOL" (registered trademark) solutions used, 8 in number, are as follows: Solution "A" 'special cleaner for sound absorbing ceilings Chemical composition Trisodium phosphate 5%

ETDA 0.5

LAUROPAL N50 1%

DPM 1%

H20 92.5%

  Characteristics: Appearance Liquid Color Transparent Boiling point 100 C Freezing point OC% Volatility 98% Ph 11.5 (+ I- 0.4) Viscosity Similar to water Flammability Inflammable Solubility in water Complete Solution "B" Oxidizing agent or activator used in addition to other solutions except "C" Chemical composition Hydrogen Peroxide 110 Vol Characteristics: Liquid Appearance Color Transparent Boiling point 108'C Freezing Point - 4 C% Volatility 99.9% Ph 6 (4 / - 0.3) Viscosity Similar to water Flammability Not flammable Solubility in water Complete Solution "C" special cleaner for water stains on absorbent ceilings Chemical composition Sodium hypochlilorite 3.3% Potash (flakes) 1% 16 Phosphoric acid 0.3%

H2O 95.4%

  Characteristics: Appearance Liquid Color Pale yellow Odor Chlorine% Volatility 99% Ph 10 (+/- 0.5) Viscosity Similar to water Flammability Inflammable Solubility in water Complete Solution "D" special cleaner for sound absorbing and non-absorbent ceilings Chemical composition ETDA 0.5% Pyrotetrapotassium phosphate 5%

LAUROPAL N50 1%

DPM 1%

H20 92.5%

  Characteristics: Appearance Liquid Color Transparent Boiling point 100'- C Freezing point O'C% Volatility 80% Ph 9.5 (+ f- 0.2) Viscosity Liquid syrup Flammability Flammable Solubility in water Infinite cleaning solution "E" special concentrate for soiling by petroleum derivatives Chemical composition Soda 1%

SULPHETAL405 0.5%

DPM 40%

H220 58.5%

  Characteristics: Liquid Appearance Color Yellow Boiling point 100 C Freezing Point OC% Volatility 77.5% Ph 11 (+/- 0.2) Viscosity Liquid syrup Flammability Inflammable Solubility in water Complete "100" solution Bactericide and fungicide leaching agent for all surfaces accepting water Chemical composition ETDA 5% Soda ash 59% Dichloroisocyanurate 6% Trisodium phosphate 20% Sodium metasilicate 10% Characteristics: Appearance Powder Color White Ph 11.5 (+/- 0.4) Density 0, 53g / cm3 Solubility in water Complete gr is sufficient for 8 liters of water. This solution leaves a protective film on the support. Solution "103" non-foaming and anti-static cleaner for carpet Chemical composition Pyrotetrapotassium phosphate 5%

BARDAC 22 0.1%

LAUROPAL N50 1%

DPM 1%

H2O 92.9%

  Characteristics: Liquid Appearance Color Clear Boiling point 100'C Freezing Point O "C Ph 8.5 Viscosity Similar to water Flammability Inflammable Solubility in water Complete Solution" 104 "cold degreasing cleaner Chemical composition Potash 3% Alcohol 95 ethyl 12% Methylene chloride 85% Characteristics: Liquid Appearance Brownish color Boiling point 110-C Freezing point - 4 C% Volatility 5% Ph 13 (+/- 0.5) Viscosity Similar to water Flammability Flammable Solubility in l complete water The liquid is propelled from the pressure of the air contained in the first tank, this pressure is obtained before using the device by "inflating" this tank with a small compressor. This compressor is only used for 3

  minutes and is no longer used during system use.

  The cleaning waste particles are recovered by siphon effect in the

third tank.

  The accompanying drawings illustrate the process: - Figure 1, on plate 113, represents the assembly mounted in section

  - Figure 2, on board 2/3, shows the assembly with the compressor before use.

  - Figure 3, on board 3/3, shows the assembly in use The tank containing the air (1) and the tank containing the liquid (2) consist of two stainless steel tanks 340 of cylindrical shape and resting vertically on the ground

or on a support trolley.

  The top of the air tank (1) is pierced with an orifice (3) for mounting a pressure gauge (4) making it possible to control the pressure of 7 bars in this tank during "inflation" by the compressor (35) . A second orifice (7) is drilled in the cover (6) of the inspection opening (27) for mounting a safety valve (5), also serving as a vent valve. This trap can be

  manually operated by pulling on the ring (8).

  A third orifice (9) is drilled to receive before use the air inlet pipe from the compressor (35). After "inflation" of the tank by the compressor, a regulator (10) fitted with a pressure gauge (11) is connected to this orifice. The regulator (10) and pressure gauge (11) assembly is responsible for reducing the pressure to 3 or 4 Bars. This set is connected by

  a blue pipe (12) to the orifice (13) of the liquid tank (2).

  A large-diameter opening (27) closed by a cover (6) and sealed by a

  seal (14) allows access to the interior of the tank.

  The top of the tank containing the liquid (2) is pierced with an orifice (13) allowing the injection of air pressure, controlled by the regulator (10) and the pressure gauge (1), inside the

liquid tank (2).

  A second orifice (25) is drilled in the cover (15) of the inspection opening (26) for the mounting of a safety valve (16), also serving as a vent valve. This trap can be actuated manually by pulling on the ring (17) A third orifice (18) is drilled to receive a plunging pole (19) whose role is to bring the liquid under pressure to a red pipe (20) and , through a handle (21), towards

  the trigger valve (22) allowing control of the liquid towards the projection nozzle (23).

  A large diameter opening (26), closed by a cover (15) and sealed by a seal (24), allows access to the interior of the tank.

  A tank intended to receive the particles of cleaning waste (28) is also made of stainless steel 340. This tank is surmounted by a vacuum pump (30) which sucks by vacuum, adjustable from 150 to 340 mb by a control adjuster (34) mounted on the suction opening (33). A filter (29) protects the vacuum pump from projections of aspirated particles. The assembly containing the vacuum pump is soundproofed by a honeycomb coating (32). A silencer (31) is mounted on the air ejection orifice of the pump. The recovery of cleaning waste particles is carried out by a flexible pipe (38) connected to a suction nozzle (36) sealed by a seal. rubber (37) all around. This squeegee also contains the micropulverization injector (23) used to micropulverize the solution

  contained in the liquid tank (2).

  By way of nonlimiting example, each tank will have dimensions of the order of 216 mm

  for the diameter, 365 mm for the height and a capacity of approximately 9.45 liters.

  The process is particularly intended for cleaning ceilings, false ceilings and interior walls of industrial premises, offices and dwellings as well as disinfection, decontamination operations and more generally all operations requiring the use of micropulverization and requiring the safeguard of the physical and chemical properties of the supports and materials cleaned, disinfected or

  decontaminated by a non-noisy, non-polluting and energy-efficient means.

Claims (3)

  1) FPro, Jéd for cleaning surfaces, characterized by the microprojection of a chilnilu e corntelnle solution in a tank (2) propelled by air under controlled pressure in iu serf renders tank (1) and rnicropulverisée by a nozzle (: '3) 9) Protééclé according to claim 1 characterized in that the rnettoy waste particles. qe are recovered in a tank (28) by means of a nozzle (36) and under the action of a vacuum pump (30).   3) Pro: assigned according to claim 1 characterized in that the liquid solutions consist of volatile products and not permeating and retaining the physical properties and chemicals of the cleaned supports.   4) Method according to claim 1 characterized in that the device consumes only 3   minutes of electrical energy for 3 hours of work.