SU1269811A1 - Filter for cleaning gases - Google Patents

Abstract

The invention relates to gas cleaning devices, can be used for fine cleaning and sterilization of gases in microbiology and adjacent regions, and improves the reliability of gas cleaning by reducing the likelihood of moisture condensation on the filter element. The filter includes a housing 1, inside of which is placed a tubular heat exchanger 8, the upper ends of the tubes of which are made with holes 14, placed (L to O5 O 00

Description

above the top tube plate 11 and adjacent to the heat-conducting element 7. In the cleaning process, the gas entering the filter through the pipes 13 of the heat exchanger 8 is heated, which leads to a decrease in its relative humidity. Further, the passage through the heat-conducting 7 and filtering 6 elements, gas flows from the housing 1 through the outlet nozzle 5. During operation,

I 1

The heat-conducting element 7 is heated by contact with the upper ends of the heat exchanger tubes 13, which leads to an increase in the temperature of the filter element 6, to an even greater decrease in the relative humidity of the gas. 1 il.

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The invention relates to gas cleaning devices and can be used for fine cleaning and sterilization of gases in microbiology and adjacent spheres.

The aim of the invention is to improve the reliability of gas cleaning by reducing the likelihood of moisture condensation on the filter element.

The drawing shows schematically a filter for cleaning gases, a longitudinal section.

The gas cleaning filter comprises a housing 1 consisting of a tumbler 2 and semi-housings welded to it 3. The housing 1 has an inlet 4 and an outlet 5 of its branch pipes. Inside the housing 1 there is a filtering element 6, which lies on the heat-conducting element 7, and a tubular heat exchanger 8. The housing 1 has heat insulation 9, which covers the heat exchanger 8,

The filter element 6 consists of two discs of 10 basalt cardboard.

The shell-and-tube heat exchanger 8 consists of tube plates 11 and 12 and tubes 13, the upper ends of which are placed above the upper tube plate 11 and are made with holes 14 on the side and end surfaces and adjoin the heat-conducting element 7, which ensures good heat transfer from the heat exchanger 8 element 7, which, on the basis of its gas permeability, can be made of porous metal or finely meshed mesh.

To ensure the most complete heat transfer from tennoo6MeHHHKa 8 to

The body 1 is provided with a heat insulator 9, which is created by pouring the heat insulating material into the annular cavity formed by the cup 2 and the semi-enclosures 3.

In order to prevent microorganisms from penetrating into the gaps between the cup 2 and the filter element 6, the gaskets 15 are provided in the filter.

When screwing the screws 16 in the nut G /, as a result of the pressure of the ring 18 on the gaskets 15, they are deformed in the radial and axial direction, thereby sealing the gaps between the cup 2 and the filter element 6.

To facilitate the replacement of the filter element without dismantling the filter, a removable cover 19 is provided, which is sealed with a rubber gasket 20.

For the supply and removal of steam to heat the casing and the filter element are provided nozzles 21 and 22,

 The filter for gas cleaning works as follows.

Before starting work, steam is supplied to the heat exchanger 8 through the pipe 21, which is discharged through the pipe 22.

30 After the time required to warm up the housing 1 and the filter element 6, heat sterilization of the internal cavity of the filter begins. To do this in the inlet 4

35, steam is supplied, which is discharged through the outlet nozzle 5. After sterilization is completed, the steam supply to the nozzle 4 stops.

In the cleaning process, the gas exiting

Claims (1)

40 from the reactor enters through the inlet 4 to the filter and, passing through the pipes) 3, is heated by the heat of steam passing through the heat exchanger. This leads to a decrease in the relative humidity of the gas to be purified. The gas then passes through the heat-conducting element 7 successively to the filter element 6 and flows from the filter housing 1 through the outlet 5. During operation, the heat-conducting element 7 is evenly heated to a temperature close to the temperature of the steam entering the heat exchanger 8 due to its contact with the upper ends of the tubes 13 of the heat exchanger 8. Accordingly, the temperature of the filter element 6 lying on the heat-conducting element 7 also rises. Therefore, when the gas to be cleaned passes through the heat-conducting element 7 and the filter element 6, it is heated further, which leads to a further decrease in the relative humidity of the gas and, consequently, decreases the likelihood of dropping moisture on the filter element 6. 114 This filter improves the reliability of gas cleaning by reducing the likelihood of condensation of moisture on the housing filter and filter element, which is ensured by their good heating during operation due to the intensification of heat supply from the heat sink to the heat conducting and filter elements and the presence of zhnoy thermal insulation of the filter housing, where the exchanger and the filter element. Claims A gas cleaning filter comprising a housing with inlet and outlet nozzles, inside of which a tubular heat exchanger, filtering and heat-conducting elements and heat insulation are located, characterized in that in order to increase the reliability of gas cleaning by reducing the likelihood of moisture condensation on the filter element The upper ends of the heat exchanger tubes are made with openings on the side and end surfaces, are placed above the upper tube plate and are adjacent to the heat conductor element.