SU1027478A2 - Continuous filter for cryogenic mediums - Google Patents

Abstract

TRAVEL FILTER FOR CRYOGENIC MEDIA by aut. St. No. 463458 / characterized in that, in order to improve performance and prevent cavitation during cooling of the filter, a drainage device is additionally installed in the housing, made in the form of a bent tube, on the upper end of which a filter material is fixed, and the other end is inserted into the outlet and provided ejection nozzle.

Description

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The invention relates to refrigeration engineering, in particular, to the design of pass-through filters for cryogenic media and can be used in chemical engineering and gas industry.

According to the main author. St. 463458 a pass-through filter for cryogenic media is known, comprising a housing with inlet and outlet nozzles, a casing mounted on the supports, removable filter inserts, a hatch with a pin1 in the housing, and an inclined partition with glasses is installed in the housing between the inlet and outlet connections for filtering inserts, the hatch being located in the upper part of the hull.

The purpose of the invention is to increase productivity and prevent cavitation when filtering.

This goal is achieved by the fact that a drainage device made in the form of a bent tube, on the upper end of which is fixed, is additionally installed in the case of a pass-through filter for cryogenic media. the filter material, and the other end is inserted into the outlet and provided with an ejection nozzle.

The drawing shows a pass-through filter for cryogenic media.

The filter includes a housing 1 with an inlet 2 and an outlet 3 with nozzles, a housing 4 mounted on supports 5 and b of thermal insulation material. The housing 1 is divided into two cavities by a columnar partition 7, into which glasses 8 with an annular bottom are welded. Inside the cups 8, filter inserts 9 are installed, consisting of a perforated frame with a filter material placed on it. Inside the housing 1 there is a drainage device made in a bidet of a bent tube 10, at the upper end of which filter material 11 is fixed, and its other end is inserted into the outlet nozzle 3 and provided with an ejection nozzle 12. In the upper part of the housing 1 there is a hatch 13, which is closed with a lid 14. The inclined partition 7 of the housing 1 is divided into two cavities: the input 15 and the output 16.

The pass-through filter for cryogenic media operates as follows.

The medium flow through the pipeline is fed through the inlet 2, filtered through the filter inserts 9 and discharged through the outlet 3. During cooling down in the upper part of the housing 1, a gas cushion forms to the cryogenic product, blocking part of the filter inserts 9, which leads to a decrease bandwidth filter.

In the npoueqce stabilization of filtration, when the working temperature is reached, condensation occurs; vlaklopyvanie gas cushion, when filled, the liquid accelerates to speeds far exceeding the stationary filtration rate of cryogenic liquid.

As a result, the kinetic energy of the colliding particles of the fluid causes a hydraulic shock. This phenomenon of cavitation can lead to the destruction of the filter inserts 9

and a filter, as well as to a leak, the cavity 16 to the external environment. At the same time, sharp frequency fluctuations of pressure are observed. filter .

 Due to the fact that there is a pressure differential between the inlet 15 and outlet 16 filter cavities due to the resistance of the filter inserts 9, the small size of the inlet of the drainage device allows you to install on it the filter material of nominal cleaning fineness 11 without the support frame of the perforated and protective coarse filter materials, what provides its smaller hydraulic resistance in comparison with the hydraulic resistance of the filtering inserts

9, the outlet end of the drainage device is provided with an ejection nozzle -12, the gas flow from the upper part of the housing 1 is discharged into the outlet 3 and removed from the filter.

The establishment of a drainage device makes it possible to increase the filter capacity and eliminate the phenomenon of cavitation when it is cooled.

Claims (1)

(5’4) PASS FILTER FOR CRYOGENIC MEDIA by ed. St. No. 463458, 'characterized in that, in order to improve performance and prevent cavitation when cooling the filter, a drainage device is additionally installed in the housing, made in the form of a curved tube, at the upper end of which is fixed filter material, and its other end is inserted into the outlet pipe and equipped with an ejection nozzle.