RU2542269C2 - Fluid corse purification module - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to filtration. Proposed module comprises vertical case composed of sidewall with cover and case bottom, inlet and outlet pipes secured at housing cover and bottom, filter element and deflector arranged at module lengthwise axis to contact with filer element, separator and accumulation chamber with central pipe. Inlet pipe end part extends into case top section with no contact with filter element. Said separator is fitted in said case with clearance composed by cover and sidewall on one side and, on the other side, by filter element and chamber sidewall.

EFFECT: higher efficiency of cleaning.

12 cl, 1 dwg

Description

The invention relates to a filtering technique and can be used for preliminary purification of liquids, including natural waters, from suspensions.

A known filter for cleaning liquids from suspended impurities (AS USSR 552096, "Filter for cleaning liquids", IPC B01D 24/10, publ. 09/30/1979). The filtration apparatus is a housing in the form of an inverse cone, which is horizontally divided horizontally by nets with layers of filter loading. The size of the loading granules in each layer consists of particles of the same hydraulic particle size and decreases in each layer subsequent to the height of the casing in the direction of fluid movement.

The disadvantages of the known device are the relatively low performance and complexity of the regeneration of the filter.

The closest in technical essence to the claimed device is a device for filtering liquid [Patent for the invention of the Russian Federation No. 2179473. A method of filtering a liquid, a device for its implementation and filter material. Publ. 02/20/2002]. The known device comprises a housing with upper and lower covers, nozzles for input and output. Inside the housing in the upper chamber, a primary cleaning grid in the form of a truncated cone with a deflector is installed. Under the primary cleaning section in the housing there is a fine cleaning section, including a support mesh with reverse taper, on which a granular filter material is placed. There is free space between the primary cleaning screen and the backfill layer. Between the support grid and the bottom cover of the device there is a lower chamber for collecting the filtrate. The granular filtering material is a porous body with a grain size of 0.1-2.0 mm.

The disadvantages of the known device are the presence of filter granular material and the absence of internal recirculation of the flow of the cleaned liquid in the flow part of the device.

The objective of the invention is to remedy these disadvantages, namely the creation of a module for pre-treatment of liquid without filter granular material and having internal recirculation of the flow of the cleaned liquid in the flow part of the device.

To eliminate these drawbacks in the liquid pre-treatment module (hereinafter referred to as the module), including a vertical housing formed by a side wall with a cover and a housing bottom, inlet and outlet nozzles mounted respectively on the housing cover and bottom, a filter element and a deflector mounted on the longitudinal axis of the module and in contact with the filter element, it is proposed:

- the module is additionally equipped with a dividing insert, an assembly chamber with a central pipe;

- bring the end part of the inlet pipe to the upper part of the body cavity without touching the filter element;

- install the separation insert with a gap in the channel formed on one side by the lid and the side wall of the housing, and on the other hand, by the filter element and the side wall of the collection chamber.

In special cases, the implementation of the device is proposed:

- to perform a filter element in the form of a ring or a truncated cone, oriented with a smaller base towards the cover;

- the filter element is made of a metal mesh, the maximum cell size of which does not exceed the size of the particles to be filtered;

- the module is additionally equipped with a guiding insert in the form of a truncated cone, reinforced with a smaller base on the end of the inlet pipe and located in the channel between the central part of the filter element and the cover;

- bring the lower part of the separation insert towards the bottom of the housing outside the side wall of the collecting tank;

- at least position the lower base of the guide under the upper part of the separation insert and install with a gap in relation to it;

- the deflector is made in the form of a cone with a vertex oriented towards the lid;

- strengthen the base of the deflector on the upper base of the filter element, having the form of a truncated cone, or in the central part of the filter element, made in the form of a ring;

- inlet and outlet pipes, to equip the central pipe with valves;

- the housing and (or) the separation insert to perform collapsible;

- the central pipe and the bottom of the collection tank are installed with the possibility of disconnection from each other.

A longitudinal axial section of one embodiment of the module is shown in the figure, which has the following notation: 1 and 2 are the side walls of the housing and the collection chamber, respectively; 3 - valve; 4 and 5 inlet and outlet nozzles; 6 - a deflector; 7 and 8 - the bottom of the housing and the collection chamber, respectively; 9 - a cover; 10 - guide insert; 11 - separation insert; 12 - filter element; 13 - the central pipe.

The liquid pre-treatment module consists of a vertical housing, inlet 4 and outlet 5 nozzles, a filter element 12, a deflector 6, a dividing insert 11, a collection chamber with a central pipe 13.

The housing is formed by a side wall 1 with a cover 9 and a bottom 7 of the housing.

Inlet 4 and outlet 5 nozzles mounted respectively on the cover 9 and the bottom 7 of the housing.

The deflector 6 is mounted on the longitudinal axis of the module and is in contact with the filter element 12.

The end part of the inlet pipe 4 is displayed in the upper part of the body cavity and is installed without touching the filter element 12.

The separation insert 11 is installed with a gap in the channel formed on one side by the cover 9 and the side wall 1 of the housing, and on the other hand, by a filter element and the side wall of the collection chamber.

In particular cases of module execution, the following design features take place.

The filter element 12 is made in the form of a ring or a truncated cone, oriented with a smaller base towards the cover 9. In addition, the filter element 12 is made of a metal mesh, the maximum cell size of which does not exceed the size of the particles to be filtered.

The module uses a guide insert 10 in the form of a truncated cone, reinforced with a smaller base on the end of the inlet pipe 4 and located in the channel between the Central part of the filter element 12 and the cover 9.

The lower part of the separation insert 11 is brought out towards the bottom of the housing 7 outside the side wall of the collection tank.

The lower base of the guide insert 10 is at least located under the upper part of the separation insert 11 and is installed with a gap in relation to it.

The deflector 6 is made in the form of a cone with a vertex oriented towards the cover 9. The deflector 6 provides hydraulic stabilization of the fluid flow at the entrance to the upper part of the housing.

The base of the deflector 6 is mounted on the upper base of the filter element 12, having the form of a truncated cone, or in the central part of the filter element 12, made in the form of a ring.

Inlet 4 and outlet 5 nozzles, the Central pipe 13 are equipped with valves 3.

The housing and (or) the separation insert 11 are made collapsible.

The Central pipe 13 and the bottom of the collection tank are installed with the possibility of disconnection from each other.

In the case of using a collapsible housing, its parts are fastened together by a flange connection.

The liquid pre-treatment module operates as follows.

The flow of the liquid being cleaned through the inlet pipe 4 enters the upper part of the housing, enters the channel between the cover 9 and the filter element 12. The movement of liquid in the specified channel is carried out with the distribution of flow along the way.

In the channel between the cover 9 and the filter element 12, the fluid flow rate has two vector components: tangential and frontal (normal) to the plane of the filter element 12.

Due to the tangential component of the velocity vector, the displacement of large particles of suspensions from the central part of the filter element 12 to its peripheral part and their accumulation in the lower part of the housing is ensured. In this case, conditions are created for filtering the liquid due to the normal component of the velocity and at the same time for self-cleaning due to the tangential flow of a significant part of the filtering surface.

From the channel between the cover 9 and the filter element 12, a portion of the liquid cleaned from large particles through the filter element 12 enters the collection chamber and their module exits through the central pipe 13, and the other part of the liquid with large particles enters the channel between the side wall of the housing 1 and the separation insert 11 and gets into the bottom of the case. In this part of the body, the liquid flow is also divided into two parts. One part of the liquid with large particles accumulates at the bottom of the housing 7, and its other part changes the direction of movement, moves along the side wall 1 of the housing and enters the channel between the side wall 1 of the housing and the separation insert 11, passes the channel between the cover 9 and the upper part of the separation insert 11 and again enters the channel between the upper part of the separation insert 11 and the peripheral part of the filter element 12, forming a closed circulation circuit in the upper part of the housing, which facilitates the process of additional cleaning otok liquids from larger particles and leads to an increase in concentration of the filtrate in the bottom of the housing.

The presence of the departure of the inlet pipe 4 from the cover 9 to the upper part of the housing allows you to organize the movement of a semi-flooded liquid stream and direct it along the surface of the filter element 12. Hydrodynamic stabilization and the thickness of the liquid stream supplied to the upper part of the body are provided using the guide insert 10.

The presence of a closed circulation loop is due to the fact that the semi-submerged jet moving along the surface of the filter element 12 involves a fluid flow that re-entered the upper part of the housing cavity from its lower part.

For periodic cleaning of the module’s flowing part from particles, an outlet pipe 5 or a central pipe 13 is used, providing liquid supply for regeneration (“bottom-up”) with the removal of accumulated particles in a drainage tank or sewer. After regeneration of the filter element 12, its performance is restored.

Effect: increasing the efficiency of liquid purification.

An example of a specific implementation of the pre-cleaning module

The housing, inlet 4 and outlet 5 nozzles, a central pipe 13, a deflector 6, a filter element 12, a separation 11 and an insert guide 10 are made of stainless steel 12X18H10T.

For a case having a thickness of 4 mm, the side wall in the form of a round cylinder has a height of 216 mm and an outer diameter of 159 mm, the cover 9, made in the form of a truncated cone, has a height of 44 mm, and the inner diameters of the upper and lower bases, respectively equal 26 mm and 108 mm, and the elliptical bottom of the housing 7 has a height of 65 mm.

The inlet 4 and outlet 5 nozzles, the Central pipe 13 have an outer diameter of 32 mm and an inner diameter of 26 mm

The filter element 12 is made in the form of a truncated cone, in which the opening angle is 120 degrees, the diameter of the upper and lower bases are respectively 17 mm and 108 mm. The working part of the filter element 12 is a grid with a mesh size of 0.063 × 0.063 mm and a wire thickness of 0.32 mm.

The deflector 6 is made in the form of a cone with a base radius of 8.5 mm, a height of 16 mm and an opening angle of 120 degrees.

In the separation insert 11 having a thickness of 2 mm, the side wall in the form of a round cylinder has an outer diameter of 141 mm, and the upper and lower parts are made in the form of truncated cones with a height of 110 mm and an opening angle of 120 degrees.

The distances between the side walls 1 of the housing, the separation insert 11 and the collection chamber are 8 mm and 10 mm, respectively.

The departure of the end part of the inlet pipe 4 into the cavity of the upper part of the housing is 10 mm.

In a collection chamber having a wall thickness of 2 mm, the height of the side wall is 20 mm, and the bottom 8 is made in the form of a truncated cone with a height of 39.5 mm, inner diameters of the upper and lower bases, respectively 108 mm and 26 mm.

The guide insert 10 has a thickness of 2 mm and is made in the form of a truncated cone with a height of 20 mm and inner diameters of the upper and lower bases, respectively, of 26 mm and 54 mm.

The module was tested for performance during field tests on natural water with particles whose size did not exceed 2 mm at a water temperature of 20 ° C and a pressure in the water stream in the inlet pipe of 4 0.4 MPa. The volumetric flow rate of water through the inlet pipe 4 was 1 m ³ / h.

The efficiency of water purification from suspension was 90% with a filter fineness of 50 microns.

Claims (12)

1. The liquid pre-treatment module, comprising a vertical housing formed by a side wall with a cover and a housing bottom, inlet and outlet nozzles mounted respectively on the housing cover and bottom, a filter element and a deflector mounted on the longitudinal axis of the module and in contact with the filter element, characterized in that the module is additionally equipped with a dividing insert, a collection chamber with a central pipe, and the end part of the inlet pipe is displayed in the upper part of the body cavity without touching the filter entom, the separation insert is installed with a gap in the channel formed on one side by the lid and the side wall of the housing, and on the other hand, by the filter element and the side wall of the collection chamber. 2. The liquid pre-treatment module according to claim 1, characterized in that the filter element is made in the form of a ring or a truncated cone oriented with a smaller base towards the cover. 3. The liquid pre-treatment module according to claim 1, characterized in that the filter element is made of a metal mesh, the maximum cell size of which does not exceed the size of the particles to be filtered. 4. The liquid pre-treatment module according to claim 1, characterized in that it is further provided with a guide insert in the form of a truncated cone, reinforced with a smaller base on the end of the inlet pipe and located in the channel between the central part of the filter element and the cover. 5. The liquid pre-treatment module according to claim 1, characterized in that the lower part of the separation insert is brought out towards the bottom of the housing beyond the side wall of the collecting tank. 6. The liquid pre-treatment module according to claim 4, characterized in that the lower base of the guide insert is at least located under the upper part of the separation insert and is installed with a gap with respect to it. 7. The liquid pre-treatment module according to claim 1, characterized in that the deflector is made in the form of a cone with a vertex oriented towards the lid. 8. The liquid pre-treatment module according to claim 2, characterized in that the deflector base is mounted on the upper base of the filter element having the form of a truncated cone, or in the central part of the filter element made in the form of a ring. 9. The liquid pre-treatment module according to claim 1, characterized in that the inlet and outlet pipes, the central pipe are equipped with valves. 10. The liquid pre-treatment module according to claim 1, characterized in that the housing is collapsible. 11. The liquid pre-treatment module according to claim 1, characterized in that the dividing insert is collapsible. 12. The liquid pre-treatment module according to claim 1, characterized in that the central pipe and the bottom of the collecting tank are installed with the possibility of disconnection from each other.