SU1556712A1 - Surface-wave filter - Google Patents

Abstract

The invention can be used to purify water vapor condensate and feed water in the circuits of atomic and thermal power plants, as well as to filter industrial wastewaters. The alluvial filter contains a cylindrical body 1 with a removable top cover 2, a filter element 6 onto which an auxiliary filter layer is fed, supplying 3 and 4 branch pipes, 5 nozzles 5 for discharge and removal of contaminated auxiliary filter material. The filter element 6 is made in the form of a paraboloid of rotation. The discharge nozzles 4 are installed on both sides with respect to the filter element 6. The inlet nozzles 3 are installed on the housing on four sides and offset from the geometric axis of the filter element 6, which takes into account the separation of the fine auxiliary material. 1 hp f-ly, 2 ill.

Description

one

(21) 4438393 / 31-26

(22) 06/08/88

(46) 04/15/90. Bul No. 14

(71) Institute of Mining, Far Eastern Scientific Center, USSR Academy of Sciences

(72) C. F. Boyko, V.N. Kislitsyn, and Yu.F. Semenov

(53) 66.067.324 (088.8)

(56) Patent of Germany No. 2951028, cl. B 01 D 37/02, 1981.

(54) SUBJECT FILTER

(57) The invention can be used to purify water vapor condensate and feed water in the circuits of nuclear and thermal power plants, as well as to filter industrial wastewaters. The alluvial filter contains a cylindrical body 1 with a removable top cover 2, a filter element 6, onto which an auxiliary filter layer is fed, supplying 3 and 4 branch pipes, a nozzle 5 for discharging and removing contaminated auxiliary filter material. The filter element 6 is made in the form of a paraboloid of rotation. The discharge nozzles 4 are installed on both sides with respect to the filter element 6. The inlet nozzles 3 are installed on the housing on four sides and offset from the geometric axis of the filter element 6, which takes into account the separation of the fine auxiliary material. 1 h. item f-ly, 2 ill.

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The invention relates to a filtering technique, namely to alluvial cartridge filters, and can be used for the treatment of wastewater, mainly water vapor condensate and feedwater for atomic and thermal power plants.

The purpose of the invention is to increase the efficiency of cleaning the liquid and using an auxiliary filtering material.

FIG. filter is shown; general view; in fig. 2 - filtering element with a washed filtering layer of auxiliary filtering material.

The precoat filter includes a housing 1 with a lid 2 and nozzles supplying the source liquid 3, draining the filtrate 4 and draining the spent auxiliary filter material 5 and filtering element 6, made in the form of a paraboloid of rotation, on which a layer 7 of auxiliary filter material is placed. Nozzles 3 for supplying the source fluid are installed on the body in pairs diametrically opposite on four sides and offset relative to the geometric axis 8 of the filter element, and nozzles for draining filtrate are installed on both sides relative to the filter element.

Alluvium filter works as follows.

Through the inlet nozzles 3, pulp with auxiliary filtering material is fed into the cavity of the cylindrical body 1, which is wiped with a layer 7 of a certain thickness onto the parabolic surface of the filter element 6. Then, after the completion of the flushing of the filtering layer, initial fluid is supplied through the inlet nozzles 3 a layer 7 of auxiliary filtering material and is discharged from the cavity of the filtering element 6 through the outlet nozzles 4 In the filtering process, due to the effectiveness of cleaning capacity and the degree of contamination of the auxiliary filtering material are monitored by analyzes on the discharge pipes 4 and the pressure drop across the filter element 6. With a limiting

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fouling of auxiliary filtering material the filtration process is stopped and the fouled alluvial layer is dropped from the parabolic surface

with air supplied through the exhaust nozzles 4 with the inlet supply nozzles 3 closed. At this time, the nozzles 5 for removing the contaminated auxiliary filtering material are open. After the removal of the spent filter material, the cycle of reclamation and filtration is repeated. The precoat filter cover 2 is removable to allow replacement of the filter element or its repair.

The invention makes it possible to increase the efficiency of cleaning condensate and feed water from oil and corrosion products, which ultimately allows to increase the efficiency of a thermal installation and its ecological purity. The effective use of the soil capacity of auxiliary filtering powder allows a significant (up to 30%) reduction in the amount of disposal of materials contaminated with radioactive substances.

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Claims (2)

Invention Formula . An alluvial filter comprising a cylindrical body with a lid and nozzles for supplying the source fluid, draining the filtrate and auxiliary filtering material and the filter element, characterized in that, in order to increase the efficiency of cleaning the liquid and using an auxiliary filtering material, the filter element is designed as a paraboloid of rotation, and the filter housing 5 is equipped with additional pipes for supplying the source liquid and draining the filtrate, while the pipes supplying the source liquid are installed in pairs diametrically opposite on four sides, and pipes for draining the filtrate on both sides. 2. The filter according to claim 1, characterized in that the nozzles for supplying the source liquid are installed offset from the geometric axis of the filter element FIG. 2