RU2181638C2 - Method of cleaning articles by ice granule jet - Google Patents

Abstract

FIELD: cleaning articles by means of water-and-ice flow in various industries. SUBSTANCE: ice granules are poured into bin at approximately 1:1 ratio; ice-and- water mixture is transported to concentrator provided with screen partition; part of water is discharged from concentrator via discharge pipe line fitted with valve for control of water returned to bin. Mixture of ice with remaining water is fed to ice spraying unit for throwing it to article to be cleaned. EFFECT: enhanced efficiency. 1 dwg _

Description

 The invention relates to the field of cleaning products from contaminants and can be used for cleaning using ice-water flow in various sectors of the economy.

 A known method of abrasive processing of a metal substrate with ice granules, including the formation of ice granules, transporting them through a pipeline in a continuous stream and throwing it onto the product using a pneumatic stream. The method is implemented by an installation comprising an ice maker, a pipeline and an ice-blasting device connected in series (application of Great Britain - 1397102 V3D). Ice shavings from the grinder are fed into the feed device, from where they are fed through the pipeline using compressed air to the ice-blasting device.

 However, the known method does not ensure the stability of the supply device due to the fact that ice chips are conglomerated during movement in a stream of compressed air through the pipeline. The operation of the ice-blasting device is disrupted, which is a significant drawback of this method.

 There is also known an apparatus for processing products with ice-abrasive material (a. With. USSR 1627389, MKI B 24 C 3/06), which contains an ice generator connected in series, a pressing feeder, a pipeline, an ice-blasting device.

 From the ice maker, the ice particles enter the compression feeder, where the ice is pressed and squeezed out into the pipeline, moving along it to the ice-blasting device. The ice entering the ice blasting device is crushed with knives and thrown out with compressed air onto the surface to be treated.

 The disadvantage of the known installation is as follows.

 Pressing and forcing ice through a pipeline requires a lot of energy. In this case, very great difficulties arise when transporting ice over considerable distances, bends of a pipeline with a small radius are unacceptable, breaks in rubber-fabric flexible pipelines, etc. are possible.

 The basis of the invention is the task of reducing energy consumption and increasing the versatility of the installation.

 The problem is solved in that in the method of cleaning products with an ice stream, including transporting ice granules through a pipeline and throwing them onto the surface to be cleaned by additionally supplied energy, the cleaning is performed by adding water to the ice mass with the possibility of changing the water content in the ice-water mixture, and the installation for purification of products, containing a hopper with a pipeline and an ice-blasting device, is equipped with a transfer pump and a hub installed in the pipeline in front of the ice-blasting device with chatoy partition, in order to avoid falling into the ice bin from a recovery line. A valve is installed in the pipeline connecting a part of the cavity of the concentrator with the hopper.

 The drawing shows a diagram of an installation for cleaning products.

 The installation comprises a hopper 1 for a mixture of water with ice, a pump 2 (fecal or ejection) for pumping the mixture, a concentrator 3 with a mesh partition 4, inlet 5 and outlet 6 pipelines (hoses), and the outlet pipe 6 has a valve 7, an ice-blasting device 8. As an ice-blasting device 8, an ejection-type nozzle device (as shown in the drawing) using compressed air as an energy carrier is used. A rotating impeller can be used to provide an ejection of ice-water flow due to centrifugal forces. The jet of ice-water mixture acts on the cleaned surface 9.

 Installation works as follows.

 Water is poured into the hopper 1 to a certain level, and then granules (flakes) of ice obtained with the help of an ice maker or pre-crushed natural ice are poured. Estimated volumetric ratio of water and ice 1: 1. Using pump 2, the mixture is fed through pipeline 5 to the concentrator 3, where part of the water passes through the mesh partition 4 and is returned to the hopper 1 through the discharge pipe 6. The amount of water discharged is regulated by valve 7. A mixture of ice with the rest of the water flows from the concentrator 3 into an ice-blasting device, where it is picked up by a stream of compressed air and thrown onto the surface to be treated. In the case of using a rotating impeller, the ice-water mixture is accelerated and thrown onto the surface to be cleaned due to centrifugal forces. Using valve 7, it is possible to control the water content in the ice-water jet by changing the amount of water returning from the concentrator to the hopper.

 The proposed method of cleaning with an ice-water jet, implemented using the installation described above, provides a reduction in energy consumption for transporting the ice-water mixture to the ice-blasting device (eliminating the press feeder and ice crusher requiring large energy costs), increasing the universality of the installation by facilitating the transportation of ice over considerable distances and eliminating from an ice-blasting device of an ice crusher with a drive, which allows you to clean a wider range of objects. In addition, the ratio of ice to water in the stream can be varied widely.

Claims (1)

 The method of cleaning products with a jet of ice granules, in which ice granules are poured into the hopper with an ice / water ratio of approximately 1: 1 and the ice-water mixture is transported to a concentrator with a mesh partition, a part of the water is discharged from the concentrator through a discharge pipe having a valve for regulating the water returned to the hopper, while the mixture of ice with the remaining part of the water is fed into an ice-blasting device for ejection of additionally supplied energy to the product to be cleaned.