CN101721848A

CN101721848A - Filter device for charged filter body

Info

Publication number: CN101721848A
Application number: CN200910261786A
Authority: CN
Inventors: 高麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2010-06-09

Abstract

The invention discloses a filter device for a charged filter body, which effectively solves the adsorption problem of the filter body on charged particles. The filter device comprises a conductor casing and a conductor filter body, wherein the conductor filter body is arranged on the conductor casing in an insulated manner, and the conductor casing and the conductor filter body are respectively connected with the positive pole and the negative pole of a power supply. The device uses the directly-charged conductor filter body to repel the charged particles in filtering slurry, and ensures that the charged particles in the filtering slurry are not adsorbed on the filter body so as to prevent the filtering membrane surface from being polluted irreversibly due to the electrostatic adsorption of solid-phase particles, therefore, only weak voltage is required to be applied between the conductor casing and the conductor filter body. The device in the invention is applicable to solid liquid separation for solution with charged solid phase particles, such as separation and purification of the solution with charged solid phase particles TiCl4 in the production process.

Description

The filter that filtering bodies is charged

Technical field

The present invention relates to a kind of filter.

Background technology

At present, during liquid-Separation of Solid and Liquid, for the filter core that reduces filter or filter membrane to the absorption of charged particle in the filter liquide, prevent to filter face static and pollute, the way that adopts is that filter core or filter membrane are placed among the high potential electric field usually.As shown in Figure 1, its specific practice is in the both sides of filter core or filter membrane the external energized conductor 3 that is oppositely arranged to be installed, make the charged particle in the solution produce electrophoresis by the electric field that in filtration system, is produced between the energized conductor 3, thereby the charged particle in the solution is adsorbed onto on the energized conductor.The shortcoming of this method is, when the charged particle in a part of solution can be subjected to stopping of filter core or filter membrane when the energized conductor of oppositely charged moves, therefore can adhere on filter core or the filter membrane inevitably; Simultaneously,, need apply the high potential electric field, cause high power consumption on the one hand, have safety problem on the other hand in order to meet the requirements of electric-field intensity.

Summary of the invention

Technical problem solved by the invention provides and a kind ofly can effectively solve the filtering bodies filter charged to the filtering bodies of the absorption problem of the charged particle in the solution.

The technical scheme that solves the problems of the technologies described above is: the filter that filtering bodies is charged, comprise conductor casing and conductor filter body, and described conductor filter body insulating mounting is on conductor casing, and described conductor casing is connected with the both positive and negative polarity of power supply respectively with the conductor filter body.

The invention has the beneficial effects as follows: based on the electric conductor characteristic of the conductor filter body that uses, this device is directly set up voltage between conductor casing and conductor filter body, and the both positive and negative polarity of this voltage is determined according to the charged character of particle in the slurries to be filtered.The particle that has served as in the filter pulp liquid is electronegative, be connected the conductor filter body this moment with power cathode, conductor casing is connected with positive source, make electronegative particle and repel as producing the Coulomb force between the conductor filter body of negative electrode, thereby electronegative particle is repelled side at the conductor filter body all the time, suppress charged solid phase particles and pollute face filtering the face Electrostatic Absorption; Charged particle positively charged in slurries to be filtered, be connected the conductor filter body this moment with positive source, conductor casing is connected with power cathode, make the particle of positively charged and as the Coulomb force that has produced repulsive interaction between the anodal conductor filter body, thereby the particle of positively charged is repelled side at the conductor filter body all the time.This device does not come the charged particle in the adsorbent solution by electric field or promotes the directed electrophoresis motion of charged particle, but utilize the directly charged charged particle that filters in the slurries that repels of conductor filter body, guarantee that the charged particle that filters in the slurries is not adsorbed on the filtering bodies, to avoid filtering face because solid phase particles Electrostatic Absorption and therefore irreversible pollution face only needs the weak voltage that applies between conductor casing and conductor filter body.This device is applicable to the Separation of Solid and Liquid that charged solid phase particles is arranged in the solution, as contains the TiCl of charged solid phase particles ₄Isolation of purified in the solution production process.

Description of drawings

Fig. 1 is the present solution filtering bodies introduced in the background technology structure to the charged particle absorption problem.

Fig. 2, Fig. 3 are respectively two kinds of operating position schematic diagrames of the application's filter.

Arrow " → " expression filtering direction in Fig. 1～3; Arrow The direction of motion of expression charged particle.

Be labeled as among the figure: the electrochondria 5 of conductor casing 1, conductor filter body 2, energized conductor 3, power supply 4, positively charged, electronegative particle 6.

The specific embodiment

Close below in conjunction with accompanying drawing that the present invention is described further.

As Fig. 2, the charged filter of filtering bodies shown in Figure 3, comprise conductor casing 1 and conductor filter body 2, be installed on the conductor casing 1 to described conductor filter body 2 insulation, described conductor casing 1 is connected with the both positive and negative polarity of power supply 4 respectively with conductor filter body 2.Owing to be installed on the conductor casing 1 to 2 insulation of conductor filter body, so not conducting produces electric current between conductor casing 1 and the conductor filter body 2.Conductor casing 1 and conductor filter body 2 respectively with after the both positive and negative polarity of low potential power supply 4 is connected, can be set up voltage, and made conductor filter body 2 directly charged between conductor casing 1 and conductor filter body 2.As Fig. 2, charged particle positively charged in slurries to be filtered, this moment is with conductor filter body 2 and 4 anodal connections of power supply, conductor casing 1 is connected with power supply 4 negative poles, make the Coulomb force that has produced repulsive interaction between the particle 5 of positively charged and the conductor filter body 2, thereby the particle 5 of positively charged is repelled side at conductor filter body 2 all the time.As Fig. 3, when slurries to be filtered are acidity, charged particle in the slurries to be filtered is elecrtonegativity usually, at this moment, conductor filter body 2 is connected with power supply 4 negative poles, with 4 anodal connections of conductor casing 1 and power supply, make the Coulomb force that has produced repulsive interaction between electronegative particle 6 and the conductor filter body 2, thereby electronegative particle 6 is repelled side at conductor filter body 2 all the time.This device does not adsorb charged particle by electric field, but utilizes the conductor filter body 2 charged charged particles that repel, as long as guarantee not Electrostatic Absorption and pollute face (conductor filter body 2) and just achieve the goal on the filter core face of charged particle.Therefore, only need the low-voltage that applies between conductor casing 1 and conductor filter body 2, just can prevent the effect of filtering bodies the absorption of charged particle.

The conversion of the both positive and negative polarity of realization power supply 4 for convenience can connect control circuit on power supply 4, the concrete structure of described control circuit, control mode are prior art, therefore repeats no more.

Safe in utilization for guaranteeing, but described conductor casing 1 ground connection.

Described conductor filter body 2 can be filter core or filter membrane.

The applicant it needs to be noted, the conductor filter body 2 in Fig. 2～3 all adopts the outer filter type that goes out in advancing, thereby promptly the liquid inner chamber that infiltrates conductor filter body 2 from the outside of conductor filter body 2 filters.Certainly, the application does not limit to and plants filter type therewith, the filter type that conductor filter body 2 advances to go out in can adopting equally, and promptly liquid filters from the outside that the inner chamber of conductor filter body 2 is penetrated into conductor filter body 2.Even if still can prevent the absorption of filtering bodies during the filter type that the application's filter advances to go out in adopting to charged particle.

Claims

1. the charged filter of filtering bodies, comprise conductor casing (1) and conductor filter body (2), it is characterized in that: described conductor filter body (2) insulating mounting is on conductor casing (1), and described conductor casing (1) is connected with the both positive and negative polarity of power supply (4) respectively with conductor filter body (2).

2. the charged filter of filtering bodies as claimed in claim 1 is characterized in that: described conductor casing (1) ground connection.

3. the charged filter of filtering bodies as claimed in claim 1 or 2 is characterized in that: described conductor filter body (2) is filter core or filter membrane.