Device for cleaning fluids in circulation systems

FIELD: process engineering.

SUBSTANCE: invention relates to water treatment in circulation systems. Proposed device comprises case of hydrodynamic filter 1 with cleaned fluid discharge branch pipe 2 in its shell and that 9 of discharging fluid bearing treated at bottom 8, cover 3 with fluid feed branch pipe 4, filtration element 7 made from hydrophobic material to compose truncated cone with larger base 6 facing said branch pipe 4, dynamic settler 4 arranged housing bottom to include cylindrical nozzle 14 with branch pipes 15 and 17, and package of and taper funnels 12 arranged in nozzle 14 and provided with central perforated tube 11. Inner space of filtration element 7 secured by spring 5 has its top communicated with fluid feed branch pipe 4, and its bottom communicated with branch pipe 9. Aforesaid package of tapered funnels 12 is communicated via central tube with branch pipe 9.

EFFECT: higher efficiency of cleaning.

2 dwg

 

The invention relates to a device for cleaning liquids from solids and water emulsion and can be used in the engine, hydromelioration and other industries associated with the separation of low concentrated suspensions and emulsions in water systems by the method of filtration (for example, in power systems diesel engines, lubrication systems, engine and other units, hydraulic systems and the like).

The need for improved devices for cleaning fluids used in the operation of various machines and mechanisms, due to the stringent requirements for purity of these fluids caused by the complexity of the design techniques, where these fluids are used.

The authors goal was to develop a device for cleaning liquids used in water systems from contamination in the form of mechanical impurities and water emulsion, having a long service life for a given fineness of purification. The study of the technical and patent literature has shown that cleaning fluids from these contaminants very effective are the filters.

Known filters for the purification of liquids, provided with filter elements of cartridge type with smooth or corrugated cylindrical surface, the flat is whether lenticular disk elements and the like, in which the fluid is supplied to the porous partition wall perpendicular to its surface (Fishermen C.V. Filtering aviation fuels. M.: Transport, 1983, s-141). The disadvantage of these filters is quite rapid clogging of the pores of this partition particles of dirt that requires stopping the process of cleaning fluid for replacement or regeneration of the filter element.

Also known filters, called hydrodynamic, which remove particles with a porous septum occurs continuously by moving the cleaned fluid parallel to the surface of this partition. This effect can be achieved either by moving porous walls relative to the fluid flow, or by supplying a fluid flow to the wall parallel to its surface (Finkelstein SL Application and cleaning fluids for mining machines. M., Nedra, 1986, p. 166-171). The disadvantages of hydrodynamic filters with a moving porous partition are the design complexity and the need for foreign energy sources, and filters with a fixed partition - the need for removal of liquids to discharge to create its flow along the surface of the partition.

Known hydrodynamic filter comprising tapering in the direction of the fluid flow housing with the output, the output pipe and drain pipe, and a cylindrical filter element in the form of a stationary porous wall, the fluid flow along which moves in narrowing the gap, ensuring a constant flow rate along the entire length of the partition (Kovalenko VP, Turchaninov VE Cleanup of petroleum products from contamination. M., Nedra, 1990, p.140-141, Risa). The disadvantage of this filter is the difficulty of making the body tapering form and the need for removal of the cleaned fluid containing an increased concentration of contaminants in the discharge (for example, in tank circulation system).

The closest in technical essence and taken for the prototype is a cartridge filter containing cylindrical body with a nozzle inlet fluid outlet fluid and filtrate and the filter element is installed coaxially to the housing and is made in the form of a truncated paraboloid (A.c. No. 665929, "Cartridge filter", B01D 35/22, B01D 27/12. Bull. Fig. 1979, No. 21). Despite the advantages of the prototype compared to the filters of traditional design (a great resource work and the ability to regulate the fineness of the cleaning liquid by changing the speed of its flow)and hydrodynamic filters supplied with a movable porous partition (no need for external energy sources), its disadvantages are neobhodimosti part of the crude liquid to discharge and the complexity of manufacturing the filter element curved to create a narrowing of the gap.

The technical result of the invention is to improve the treatment efficiency of the liquid due to the additional gravitational purification of the liquids to be allowed to discharge into the tank circulation system while simplifying technology create a narrowing of the gap for flow of fluid.

This technical result is achieved by the fact that in the known hydrodynamic filter, comprising a housing, a vertical wall which is made from the outlet nozzle of the purified liquid, and the bottom port of discharge of a portion of the purified fluid tightly mounted on the housing cover with the tube feeding the cleaned fluid, the filter element is in the form of a porous septum, placed inside the case with the formation of the annular gap of variable cross-section, according to the invention with the outer side of the bottom housing dynamic gravitational settling tank, comprising a cylindrical with conical bottom nozzle with nozzle in the shell for removal in dynamic sump fluid and the pipe at the top of the conical bottom for drainage sludge, and located in the interior of the nozzle on its vertical axis, mounted on the nozzle discharge of a portion of the purified liquid perforated tube, the total area of each row of holes in the wall which increases its altitude, and the outside of which is all about her height is placed a conical funnel, remote from each other by a given distance, rigidly connected among themselves and with the conical bottom of the nozzle, and the lower ends of the bases of the funnels are installed with a gap relative to the outer surface of the perforated tube, and their large base is directed toward the filter element at an acute angle α to the vertical axis, while the filter element is made of a hydrophobic porous material in the form of a truncated cone, spring-loaded and converted bolshim base to the tube feeding the cleaned liquid, and the smaller base of the filter element is mounted in the nozzle discharge of a portion of the purified liquid, which is connected with the Central perforated tube dynamic gravitational settling.

Figure 1 shows a device for the purification of liquids in water systems, and figure 2 - cross section.

The device includes a cylindrical housing of the hydrodynamic filter 1 with the outlet nozzle of treated liquid 2 and hermetically mounted on the cover 3 with the tube feeding the cleaned fluid 4. Inside the housing by means of a pressure spring 5 has a filter element consisting of a flat base 6 and the conical porous partition walls 7 held by the spring 5 in the down position. The lower end of the conical porous wall 7 is hermetically installed in on th is m in the bottom 8 of the housing 1 the nozzle discharge of a portion of the purified fluid 9, which by the Union nut 10 is connected to the fitting perforated tube 11 dynamic gravitational sedimentation tank, made in the form of package conical funnels 12 mounted with a radial clearance δ with respect to the perforated tube 11 and fastened by the tie-rods 13. Dynamic sedimentation tank placed in the nozzle 14 mounted on the bottom 8 of the housing 1 and having a vertical wall socket 15 for draining cleaned in a dynamic sump fluid. In the lower part of the housing 1 has a conical bottom 16 with a pipe for draining the sludge 17.

The effect obtained when the device is possible due to the fact that entering the reset of the hydrodynamic filter portion of the purified fluid through which is flush contaminants from the working surface of the filter element, additionally cleared in the gravitational dynamic settling tank, which reduces the amount received in the tank circulating system of the impurities and thereby reduces the load on the system.

As a porous hydrophobic partitioning is used, as an option, wire mesh with PTFE coating, having, along with the required filtration performance and low hydraulic resistance, high riser capacity (A.S. No. 1063441 "water-Repellent partition for Phil the TRS-separators". B01D 39/00, 01D 37/02. Bull. Fig. 1983, No. 48).

Feed the cleaned fluid into the internal cavity of the filter element ensures the best conditions for removal hold on a porous septum of solid particles and droplets of water in the dynamic settler, and the conical shape of this partition is due to the need of creating a longitudinal purifying water flow, moving with a constant velocity along the surface of the porous wall, which provides the same hydraulic resistance at all points of this surface, at the same time simplifying the technology of creating a narrowing of the gap for the flow of fluid through its feed into the internal cavity of the conical filter element.

Installation of dynamic gravitational settling due to the need to clean the part of the water, which creates a longitudinal flow in the filter element and contains washed away with its working surface contamination, to reduce contamination of the liquid discharged into the tank circulation system. The design of the package conical funnels with a surface extending in the direction of travel of the liquid, reduces the flow velocity in the space between the craters, which contributes to the intensification of falling out of dirt. The increase in the total area of each row of holes in the Tinqueux height of the perforated Central tube allows you to provide a uniform flow of fluid to all of the funnel, and the installation of craters at an acute angle α to the vertical axis of the device allows removal of precipitated from a liquid stream pollution in the radial clearance between the ends of the funnels and the perforated tube, and then in the bottom of the conical nozzle, where is removed through pipe for draining the sludge. The angle between the generatrix of the funnel and the vertical axis of the device should be not less than determined by the formula

α=arctgf,

where f=0.7-0.8 - coefficient of friction between the surface of the funnel and particle pollution or microcable water. As an example, for water microdrops.

When the coefficient of friction f=0.75f angle plates α=36,87°, that is, the rolling drops from the funnel at a lower angle of its inclination impossible.

Device for the purification of liquids in water systems is as follows. Contaminated fluid under pressure through the feed pipe being cleaned fluid 4 flows into tapering cavity formed by porous partition 7, passes through the pores of this partition enters the annular gap between the housing of the hydrodynamic filter 1 and a porous partition wall 7 and is discharged through pipe 2, and part of the liquid creates a longitudinal flow along the inner surface of the porous partition walls 7 and, in the form of a concentrated suspension saturated with particles of emulsion and water, through the pipe 9 the village who shall serve perforated tube 11 through the holes in the tube is distributed over the conical funnels 12, on the surface of which is deposited solid particles and droplets of water. The precipitated impurities are moved on the surface of the funnels 12 in the direction of the radial gap between the funnels and the perforated tube 11, through the gap disposed in the conical bottom 16 and is removed through pipe 17. Purified in dynamic sump liquid through the pipe 15 is returned to supply tank circulating system.

Device for the purification of liquids in water systems, comprising a housing, a vertical wall which is made from the outlet nozzle of the purified liquid, and the bottom port of discharge of a portion of the purified fluid tightly mounted on the housing cover with the tube feeding the cleaned fluid, the filter element is in the form of a porous septum, placed inside the case with the formation of the annular gap of variable cross-section, characterized in that the device further comprises a fixed outer side of the bottom chassis dynamic gravitational settling tank, comprising a cylindrical with conical bottom nozzle with nozzle in the drum for discharge of treated in dynamic sump fluid and the pipe at the top of the conical bottom for draining the sludge, and located in the interior of the nozzle on its vertical axis fixed to the nozzle discharge of a portion of the purified liquid PE tarirovannogo tube the total area of each row of holes in the wall which increases its altitude, and the outside of which throughout its height is placed a conical funnel, remote from each other by a given distance, rigidly connected among themselves and with the conical bottom of the nozzle, and the lower ends of the bases of the funnels are mounted with radial clearance relative to the outer surface of the perforated tube, and their large base is directed toward the filter element at an acute angle α to the vertical axis, while the filter element is made of a hydrophobic porous material in the form of a truncated cone, spring-loaded and converted a large base for tube feeding the cleaned liquid, and the smaller base of the filter element is mounted in the nozzle discharge of a portion of the purified liquid, which is connected with the perforated tube gravitational dynamic settler.



 

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