FR2671983A1 - System for filtering liquids with particles in suspension - Google Patents

Abstract

Filtration system for liquids with suspended particles, characterized in that the settling tank is divided into a first and a second tank (91), (92) with lower communication (41) between them, the washing / rinsing line (42) opening into the first reservoir (91) which, in turn, communicates with the dirty liquid reservoir (7), by providing at the outlet of the distribution assembly (6) a bifurcation (13 ') of the clean liquid line (13), which opens into the dirty liquid tank (7). Applicable to electro-erosion machines.

Description

"SYSTEM FOR FILTRATION OF LIQUIDS WITH PARTICLES

IN SUSPENSION".

  In the filtration system according to the Spanish patent 8900619, it has been found in practice that some of these elements are improvable after having detected the following problems: the liquid which is contained in the settling tank (9) is the result of various arrivals to different moments of liquids with a different degree of impurity10 or contamination, and thus by mixing one loses time and energy; each time the system is restarted after each stop, a filter effect is produced on the filter (10).

  water hammer that pulls unwanted impurities from the pipe (13) clean liquid.

  These problems have been overcome by the applicant as explained below.

  Figure 1 is a schematic view of the improvements made to the liquid manufacturing system with

suspended particles.

  An exemplary non-limiting embodiment of the present invention is described below.

  no other embodiments introducing ancillary changes that do not detract from its principle; on the contrary, the present invention also encompasses all its variants.

  The system that is the subject of the Spanish patent 8900619 operates in the following way. Filtration phase: The dirty liquid (24) pumped by means of the pump (27) travels the following trajectory: first channel (1) * fourth channel (4) + upper channel (11) of the lower channel filter (12) of the fifth channel lilter 2 -

  (5) * second lane (2) 4 pipe (13).

  Filter washing phase: The filter (10) in use does not perform its function well and it must be regenerated, that is why the distribution assembly (6) is provided so that the circulation of liquid by means of the pump (27) is the following: first channel (1), fifth channel (5) lower channel (12) of the filter (10), upper channel (11)

  of the filter (10) fourth way (4) 3 third way -

settling vessel (9).

  O 10 Filter rinsing phase: after the filtering phase, the filter element (26) does not remain in position or in a correct state inside the filter (10) and there are still particles that have resisted In order to overcome these conditions and to be able to start again with the filtering phase, Eson subjects the filter to a rinsing phase where the circulation of liquid is as follows: first channel (1) 4 fourth channel (4) + upper channel (4) 11) of the filter (10)> lower channel (12) of the filter (10) + fifth channel (5) - third

  lane (3) v settling vessel (9).

  In the improvements, it is provided that the settling vessel (9), via a wall (40) is divided into a first tank (91) and a second tank

(92) -

  The wall (40) can be movable to adjust the volumes of the first and second reservoirs (91), (92) to the needs, and a series of perforations (41) have been practiced therein.

  in communication the first and second reservoirs (91), (92).

  The dirty liquid comes from the washing and

  rinsing, via the washing pipe (42)

  rinsing it pours into the first tank (91).

  The liquid of the washing phase is very dirty and the impurities in suspension tend to settle, which favors, under the pressure of the current which is produced between the first and the second tanks (91), (92) by the intermediate of the orifices (41), the fact that the impurities pass mainly in the second reservoir (92) Subsequently, the rinsing phase

  gives a cleaner liquid in the washing pipe-

  rinsing (42) which, entering the first reservoir (91), leads to the second reservoir (92) the few impurities deposited therein, so that in the first reservoir (91) remains a relatively clean liquid and in the second reservoir (92) a dirty liquid and the deposited impurities (44) which can

  be extracted in a traditional way.

  A tank (91) has been obtained with relatively clean liquid which can be used in the washing and settling phases and which, for example, via the valve (mi) is brought into communication with the liquid container. dirty (7) (relatively dirty). In the first tank (91), level sensors, a lower sensor (01), an intermediate sensor (02) and an upper sensor (03) are provided, but it is within the scope of the invention to equip the other

  tanks of similar level sensors.

  Thus, it is expected that the level sensor series (01, 02, 03), which together with the pressure gauge signal (M) of the filter pressure (10), are input signals of an automation set of the system which controls the regulating elements (5), (m), (ml), (mr), (27),

passage of liquid.

  Whenever the plant is started and the pump (27) goes into operation for the filtering phase, there is a very considerable increase in pressure on the filter (10) which causes the particles to impurity that will stop on the pipe (13) that is supposed to be

  only for filtered liquid, that is to say clean.

  To overcome the problem, there is a bifurcation (13 ') of the pipe (13) of filtered liquid, which opens into a dirty liquid reservoir (7), (91)

  in Figure 1 it goes to the dirty liquid tank (7).

  The system can be manual but it is better to equip it with traditional automatisms so that, for example, it can work like this.

Phase of filtering: 1st phase.

  The dirty liquid (24) is filtered as already indicated in the main patent. The valve (m) of the pipe (13) is closed and the valve (m 2) of the

  bifurcation (13 ') opening into the dirty tank M 7).

  This first phase lasts, for example, 15 seconds.

  2nd phase We close the valve (m 2), we open the valve (m), and the system continues to work as we

  already described in the main patent.

  Washing and rinsing phase: The valve (ml) is opened and the first tank (9) of the settling tank (9) is put in communication with the dirty liquid tank (7) until the level in the first tank (91) reaches the lower level sensor (01) The valve is closed (m 1) and the system starts to operate as described for this wash phase in the main patent, until the level in the first tank (91) upward reaches the intermediate sensor (02), which begins the rinsing phase which lasts until the level in the first tank (91) reaches the higher level sensor

(03) and so starts the cycle again.

  It can be provided that the communication (41) between the first and second reservoirs (91), (92) can be regulated. -

R E Y E N D I C A T IO N S

  1 system for filtering liquids with suspended particles, characterized in that the settling tank is divided into first and second reservoirs (91), (92) with communication (41) therebetween, the washing-rinsing line

  (42) opening into the first tank (91) which, in turn, communicates with the dirty liquid tank (7).

  2 system for filtering liquids with suspended particles, according to the preceding claim, characterized in that the communication between the first and second reservoirs consists of a series of perforations (41) below in the separating element (40) of these tanks. 3 Liquid filtration system with particles

  in suspension, according to preceding claims, characterized in that, at the outlet of the distribution assembly (6), provision is made

  a bifurcation (13 ') of the pipe (13) of clean liquid, which opens into the dirty liquid tank (7). 4 Liquid filtration system with particles

  suspension according to preceding claims, characterized in that at least in the first reservoir (91) is provided

  a series of level sensors (1), (02), (03) which together with the pressure gauge signal (M) of the filter pressure (10) are the input signals of a system automation unit which controls the regulating elements (5) (m), (ml), (mr),

(27) of the liquid passage.