CN2686699Y

CN2686699Y - Improved ceramic filtering machine

Info

Publication number: CN2686699Y
Application number: CN 200420026026
Authority: CN
Inventors: 吴伯明; 何卫平; 徐志良
Original assignee: YIXING NON-METALLIC CHEMICAL MECHINERY FACTORY JIANGSU PROV
Current assignee: YIXING NON-METALLIC CHEMICAL MECHINERY FACTORY JIANGSU PROV
Priority date: 2004-04-02
Filing date: 2004-04-02
Publication date: 2005-03-23
Anticipated expiration: 2014-04-02

Abstract

The utility model relates to a ceramic filter of material slurry dehydrating, in particular to a ceramic filter which can effectively keep the concentration of the normal material slurry. The utility model is characterized in that: the reverse flushing area of a material slurry groove is provided with a water discharging overflowing pipe. The water discharging overflowing pipe consequently can quickly and effectively discharge cleaning water which reversely flushes and cleans a filter plate and falls into the material slurry groove, consequently stabilizing the concentration of the normal material slurry and keeping the effect of the dehydration. Compared with the filter which isn't provided with the water discharging overflowing pipe, dehydration deliverability is improved by 10-20 %. The utility model not only improves the production of dehydration material, but also improves the quality of the dehydration material.

Description

The ceramic filter of improvement

Technical field

Utility model is the improvement to slurry dewatering drying of ceramic filter, relates in particular to the ceramic filter that can effectively keep normal pulp density.

Background technology

The dry ceramic filter of using of essence mine dehydration, the filter that relates to as the CERAMEC filter of Outokumpu OYJ and Chinese patent 99203291,99204438 etc., slip is by ceramic filter plate week rotation in slurry vessel (flotation cell), finish successively inhale starch, dehydrate, filter cake discharging, four processes of backwash reach and dehydrate.Therefore ceramic filter plate is whenever finished and is once inhaled slurry dehydration (rotating a circle), with regard to needing filter plate is carried out a backwash, and for example filter is cleaned under 0.06-0.08Mpa hydraulic pressure, and each rinse water then all falls into slurry vessel.Yet the water that frequent backwash produces falls into slurry vessel, can cause the dilution of pulp density to reduce, and this dilution is at first in the backwash district, therefore, there is big concentration gradient in pulp density in the actual slurry vessel, and pulp density is minimum in the backwash district, enters the slurry district and will hang down 10-20%.And filter filters production capacity and pulp density is proportionate, the pulp density height, and throughput of filtration is just big, and pulp density is low, and throughput of filtration is just low.Backwashing water falls into pulp tank, has destroyed normal pulp density, causes pulp density to reduce, and filter production capacity descends, and the dried ore pulp power consumption of ton increases, and this is that dewatering and filtering is undesirable.

Summary of the invention

The purpose of utility model is to overcome the deficiency of above-mentioned prior art, and a kind of backwash little effect pulp density is provided, and can effectively keep normal dewatered slurry concentration, keeps the ceramic filter of throughput of filtration.

The utility model purpose realizes, the main improvement is to have additional overflow pipe in slurry vessel backwash district, will fall into the backwashing water of slurry vessel, discharges outside the slurry vessel by overflow pipe rapidly, effective like this normal concentration of keeping slip, not making falls into water because of backwash reduces pulp density.Specifically, the utility model ceramic filter comprises slurry vessel and the ceramic filter plate that rotates in slurry vessel, it is characterized in that slurry vessel backwash district is provided with the draining overflow pipe.

For effectively guaranteeing backwashing water is as far as possible all discharged outside the slurry vessel, utility model draining overflow pipe, a kind of better mode is to be axially disposed within some draining overflow pipes.The said overflow pipe of utility model cross section better should be greater than the backwash tube cross section, and makes both flows similar as far as possible, and backwash is fallen into water and can all be discharged like this.In addition, utility model can also be provided with flow control valve on the draining overflow pipe, makes overflow pipe adjust the Overflow drainage amount according to the backwash water yield and pulp density requirement.

In addition, utility model also can be designed to the draining overflow pipe adjustable for height bushing type, by regulating the overflow pipe open height, reaches the adjusting pulp density, as requires the pulp density height, then the overflow mouth of pipe is turned down, and discharges more thin liquids, otherwise then raises the overflow mouth of pipe.

Utility model is owing to have additional the draining overflow pipe in filter slurry vessel backwash district, thereby can be discharged from stock tank rapidly with filter is recoiled to fall into water, prevented that effectively the ceramic filter pulp density is lowered (dilution) because of backwash is drowning, causes throughput of filtration to reduce.It has overcome prior art, and backwashing water falls in the slurry vessel, causes the undesirable dilution of slip, reduces the shortcoming of dehydration production capacity.Utility model can more not install the filter of draining overflow pipe additional, and the dehydration production capacity can improve 10-20%, and not only dehydrated material output improves, and the dehydrated material quality also has raising.

Below in conjunction with two preferred embodiments, further specify utility model.

Description of drawings

Fig. 1 is the utility model first example structure schematic diagram.

Fig. 2 is the utility model second example structure schematic diagram.

The specific embodiment

Embodiment 1: referring to Fig. 1, the utility model ceramic filter, comprise slurry vessel 5, be arranged on rotation ceramic filter plate 3 in the slurry vessel, be provided with the slip overflow pipe 2 of keeping slurry level near the slurry vessel stock inlet 1, slurry vessel backwash district be axially arranged with some calibers than backwash tube big and axial telescope formula draining overflow pipe 6, draining overflow pipe 6 mouths of pipe are lower than the about 200-500mm of slip overflow pipe 2 mouths of pipe, also are provided with control valve device 4 on the draining overflow pipe.Filter work, backwash water falls in the slurry vessel, can be discharged from outside the groove by the draining overflow pipe, has effectively kept pulp density in the slurry vessel, discharges dilution and then returns the thickening pond sedimentation.Look the pulp density requirement, also can adjust the overflow pipe open height.

Embodiment 2: referring to Fig. 2, as embodiment 1, also can omit the slip overflow pipe, only in slurry vessel backwash district draining overflow pipe 6 is set.

Claims

1, a kind of ceramic filter comprises slurry vessel and the ceramic filter plate that rotates in slurry vessel, it is characterized in that slurry vessel backwash district is provided with the draining overflow pipe.

2,, it is characterized in that said draining overflow pipe axially has many according to the described ceramic filter of claim 1.

3,, it is characterized in that slurry vessel enters the slurry district slip overflow pipe is arranged according to claim 1 or 2 described ceramic filters.

4,, it is characterized in that the said draining overflow mouth of pipe is lower than the slip overflow mouth of pipe according to the described ceramic filter of claim 3.

5,, it is characterized in that said draining overflow pipe cross section is greater than the backwash tube cross section according to the described ceramic filter of claim 4.

6,, it is characterized in that said draining overflow pipe is provided with flow control valve according to claim 3 or 4 described ceramic filters.

7,, it is characterized in that said draining overflow pipe is the slotting liftable structure of cover according to claim 3 or 4 described ceramic filters.

8,, it is characterized in that the said draining overflow mouth of pipe is lower than the about 200-500mm of the slip overflow mouth of pipe according to the described ceramic filter of claim 4.