CN103657205A - Vertical-type filter disc filtration thickener - Google Patents

Abstract

The invention provides a vertical filter disc filter concentrator, comprising a filter disc, a material bin, a hollow main shaft, a driving device, a distribution valve and a frame; the material bin is arranged below the filter disc, and the hollow main shaft passes through the The filter plate is provided with the distributing valve at one end and is connected with the driving device, and the silo and the hollow main shaft are supported by the frame. In addition to liquid-solid separation, the present invention can economically and rationally remove the water in the pulp to achieve the purpose of concentrating the pulp. The equipment has compact structure, small floor space and low investment; large filtration area and low cost per unit filtration area, which can realize large-scale development; continuous operation, high production efficiency and large production capacity; fewer failures and high operating rate; automatic operation, Low operating intensity; easy operation and maintenance, energy saving, low production cost, wide application range, and can be widely used in non-ferrous metals, mining, chemical and other industries.

Description

A vertical filter disc filter concentrator

technical field

The invention relates to a concentrator, in particular to a vertical filter disk filter concentrator.

Background technique

The vertical filter disc filter currently used is a device that uses vacuum as the filtering power to separate the slurry from solid to liquid. The vertical filter disc filter adopts technologies such as reverse blowing and unloading, variable speed stirring, and automatic centralized lubrication, making it a reliable continuous production dehydration equipment. Its advantage is that the solid content of the filter cake is high, and the water content is less than or equal to 30%, but it has the disadvantage of low production capacity of a single equipment.

Thickener is a solid-liquid separation device based on gravity settling, usually made of concrete, wood or steel as a structural material to build a shallow cylindrical tank with a conical bottom. The pulp with a solid content of 10% to 20% can be concentrated into an underflow pulp with a solid content of 45% to 55% by gravity sedimentation, with the help of the slow-running rake arm of the thickener installed inside the tank (1 /3～1/5r/min), so that the thickened underflow pulp is discharged from the underflow port at the bottom of the thickener. The upper part of the thickener produces relatively clean clarified liquid, which is overflowed and discharged from the top annular chute.

Thickeners are widely used in hydrometallurgy, mineral processing plants, chemical plants and other production sites that require solid-liquid enrichment and separation, with a diameter of 3-100m and a depth of 2-4m. Its advantage is that the production capacity of a single unit is high, but the underflow concentration is lower than 60% (low solid content), and the unit production capacity occupies a large area.

In industries such as mineral processing and chemical production, with the large-scale adoption of flotation technology, the proportion of fine particles in the solid phase of the pulp is getting higher and higher (-200 mesh ≥ 85%), and the sedimentation speed of the pulp is slowing down. The choice of flocculant It is becoming more and more difficult, and the capacity of the thickener based on the principle of gravity sedimentation is severely restricted. If the concentration of the underflow can be increased by 2-3 percentage points on the current basis, the operation control and production energy consumption of the subsequent production process will be greatly improved. improvement.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a vertical filter disc filter concentrator, the cross-section of the silo is an inverted triangle, and a spiral slagging device is installed at the opening at the bottom. The present invention can not only carry out liquid-solid separation In addition, it is mainly to remove the water in the pulp economically and reasonably to achieve the purpose of pulp concentration.

In order to realize the above-mentioned purpose of the invention, the present invention takes the following technical solutions:

The invention provides a vertical filter disc filter concentrator, the concentrator includes a filter disc, a silo, a hollow main shaft, a driving device, a distribution valve and a frame; the silo is arranged under the filter disc, and the hollow The main shaft passes through the filter disc horizontally, one end of which is provided with the distributing valve, and is connected with the driving device, and the silo and the hollow main shaft are supported by the frame.

The filter disc includes a filter disc body and a filter cloth, and the filter cloth covers the filter disc body. There are 1 to 10 filter discs.

The silo is parallel to the hollow main shaft, and its cross section is an inverted triangle with an opening, and a spiral slagging device is provided at the opening.

An overflow pipe is provided on the silo, and the overflow pipe is composed of an adjustable gate valve and a catheter; and a slag hopper is provided on one side of the silo, and the upper edge of the slag hopper and the upper edge of the silo are located on the same horizontal line .

One side of the silo is provided with a feed inlet and a slag flushing and pulping device, and the slag flushing and pulping device is located at the upper part of the feed inlet.

The slag flushing and pulping device includes a feeding branch pipe and a nozzle; the feeding pipe is connected to the feeding port, and a bypass is provided on the feeding pipe, and a valve is provided on the bypass; The feed branch pipe, the nozzle on the feed branch pipe is set towards the filter disc.

The distribution valve includes a moving disk and a static disk; the static disk is provided with at least two nozzles, and the two nozzles are respectively connected to the air suction device and the blowing device; the moving disk is located inside the static disk , connected with the hollow spindle.

The filter disc is made of plastic material or metal material, and the feed bin and distribution valve are made of metal material.

The metal material is stainless steel or carbon steel;

The stainless steel is prepared from an alloy with a carbon content of 0.075%, a silicon content of 0.94%, a manganese content of 0.97%, a phosphorus content of 0.035%, a sulfur content of 0.025%, a chromium content of 14.0%, and a balance of iron. The percentages are percentages by weight;

The carbon steel is prepared from an alloy with a carbon content of 0.12-0.20%, a silicon content of ≤0.30%, a manganese content of 0.30-0.70%, a sulfur content of ≤0.045%, a phosphorus content of ≤0.045%, and the rest being iron, The stated percentages are by weight.

Compared with prior art, the beneficial effect of the present invention is:

1) It has dual functions of filtration and concentration. During the operation of filtration and concentration, coarse particles settle down, and fine particles are vacuum-adsorbed by the filter plate. This kind of filtration that can separate coarse and fine particles greatly improves the capacity of the filter;

2) Cancel the original special stirring device, greatly reducing the energy consumption of the filter.

3) The structure of the present invention is compact, and compared with thickeners, it occupies a smaller area and requires less investment;

4) The filter area is large, and the cost per unit filter area is low, which can realize large-scale development;

5) Continuous operation, high production efficiency and large capacity;

6) Fewer rotating parts, fewer failures and high operating rate;

7) Humanized design, automatic operation, low operation intensity;

8) The invention is easy to operate and maintain, saves energy and reduces consumption, and has low production cost;

9) It has a wide range of applications and can be widely used in non-ferrous metals, mining, chemical and other industries.

Description of drawings

Fig. 1 is a structural diagram of a vertical filter disc filter concentrator;

Among them, 1-filter plate, 2-distribution valve, 3-silo, 4-frame, 5-overflow pipe, 6-screw slag discharge device, 7-slag hopper, 8-feed inlet, 9-slag flushing Mixing device.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The present invention provides a vertical filter disc filter concentrator, the concentrator includes a filter disc 1, a material bin 3, a hollow main shaft, a driving device, a distribution valve 2 and a frame 4; the material bin 3 is provided with the filter disc 1, the hollow main shaft passes through the filter disc 1 horizontally, one end of which is provided with the distributing valve 2 and is connected to the driving device, and the silo 3 and the hollow main shaft are supported by the frame 4.

The filter disc 1 includes a filter disc body and a filter cloth, and the filter cloth covers the filter disc body. There are 1 to 10 filter discs 1 .

The silo 3 is parallel to the hollow main shaft, and its cross section is an inverted triangle with an opening, and a spiral slagging device 6 is provided at the opening.

The silo 3 is provided with an overflow pipe 5, and the overflow pipe 5 is composed of an adjustable gate valve and a catheter; on the same horizontal line.

The overflow pipe 5 can move up and down, and by adjusting the position of the gate valve of the overflow pipe 5 on the height of the feed bin 3, the height of the slurry in the feed bin 3 can be controlled to realize the purpose of controlling the thickness of the filter cake.

One side of the silo 3 is provided with a feed inlet 8 and a slag flushing and pulping device 9 , and the slag flushing and pulping device 9 is located at the upper part of the feed inlet 8 .

The slag flushing and mixing device 9 includes a feed branch pipe and a nozzle; the feed pipe is connected to the feed port 8, and a bypass is provided on the feed pipe, and a valve is provided on the bypass; A feed branch pipe, the nozzle on the feed branch pipe is set towards the filter disc 1.

The distribution valve 2 includes a moving disk and a static disk; the static disk is provided with at least two nozzles, wherein the two nozzles are respectively connected to the air suction device and the blowing device; the moving disk is located on the static disk The inner side is connected with the hollow main shaft.

The filter disc 1 is made of plastic material or metal material, and the feed bin 3 and distribution valve 2 are made of metal material.

The metal material is stainless steel or carbon steel;

The stainless steel is prepared from an alloy with a carbon content of 0.075%, a silicon content of 0.94%, a manganese content of 0.97%, a phosphorus content of 0.035%, a sulfur content of 0.025%, a chromium content of 14.0%, and a balance of iron. The percentages are percentages by weight;

The carbon steel is prepared from an alloy with a carbon content of 0.12-0.20%, a silicon content of ≤0.30%, a manganese content of 0.30-0.70%, a sulfur content of ≤0.045%, a phosphorus content of ≤0.045%, and the rest being iron, The stated percentages are by weight.

The main function of the vertical filter disk filter concentrator provided by the invention is to separate and dehydrate liquid and solid, and to make the water content of the solid phase as low as possible, so as to facilitate the transportation and storage of solid phase materials.

Filtration principle: the filter cloth absorbs the solid phase in the slurry, vacuum filters, and blows back to remove slag.

The filtering process is briefly described as follows:

The slurry enters the silo 3 from the side feed port 8 by the slurry pump, and drives the hollow main shaft and the filter disc 1 to rotate through the driving device. When the filter disc 1 rotates to a certain angle, the filter disc 1 is immersed in the stable height of the silo 3. In the slurry, under the action of vacuum, a pressure difference is formed inside and outside the filter plate, and the solid phase is trapped and adsorbed on the surface of the filter cloth; the filtrate is sucked into the filter disc 1, flows into the distribution valve 2 through the hollow shaft, and finally flows into the filtrate collection tank . The filter cake falls into the slag hopper 7 in the unloading area (the filter disc 1 rotates to the part above the filter slag discharge port and enters the unloading area) by air blowback. At the same time, a part of the ore pulp entering the vertical filter disc filter thickener can be separated for slag washing and pulping of the filtered dry material (that is, as slag washing water for rinsing the filter cloth or adjusting water for adjusting the solid concentration of the filter cake). To meet the requirements of filter cake concentration. According to the above working principle, the continuous rotation of the filter will form a continuous cycle filtration work.

Vertical filter disc filter concentrator, the concentration function is gravity sedimentation, and the screw is forced to unload.

The enrichment process is briefly described as follows:

During the filtration and concentration process of the slurry, the particle size distribution of the solid phase in the slurry is uneven, and a large part of the large-size solid particles will settle downward at all times, especially the particles with high density and high specific gravity will settle faster. According to the above Due to the characteristics of easy sedimentation of the filtered slurry and ore slurry, we designed the silo 3 of the filter thickener to be an inverted triangular cross-section (that is, the sedimentation and concentration part), and canceled the original stirring device to accelerate the sedimentation of the material , A spiral slagging device 6 is designed at the bottom of the settling silo 3 to discharge materials with high solid concentration regularly and quantitatively.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (10)

1. a vertical filter disc filter thickener, is characterized in that: described thickener comprises filter disc, feed bin, hollow spindle, drive unit, distributing valve and frame; Described feed bin arranges described filter disc below, and described hollow spindle level is through described filter disc, and its one end is provided with described distributing valve, and is connected with described drive unit, and described feed bin and hollow spindle are by described frame support.

2. vertical filter disc filter thickener according to claim 1, is characterized in that: described filter disc comprises filter disc body and filter cloth, and described filter cloth covers on described filter disc body.

3. vertical filter disc filter thickener according to claim 2, is characterized in that: described filter disc is provided with 1～10.

4. vertical filter disc filter thickener according to claim 1, is characterized in that: described feed bin is parallel with described hollow spindle, and its cross section is del, and opening is left in bottom, and opening part is provided with spiral slag-draining device.

5. vertical filter disc filter thickener according to claim 4, is characterized in that: described feed bin is provided with overflow pipe, and described overflow pipe is comprised of adjustable gate valve and catheter; Described feed bin one side is provided with slag bucket, and the top edge of slag bucket top edge and feed bin is positioned on same level line.

6. vertical filter disc filter thickener according to claim 4, is characterized in that: described feed bin one side is provided with charging aperture and flushing cinder size mixing device, and described flushing cinder size mixing device is positioned at described charging aperture top.

7. vertical filter disc filter thickener according to claim 6, is characterized in that: described flushing cinder size mixing device comprises feed-inputing branched pipe and shower nozzle; Charge pipe is connected with charging aperture, and described charge pipe is provided with bypass, and described bypass is provided with valve; Described bypass separates a plurality of feed-inputing branched pipes, and the shower nozzle on feed-inputing branched pipe is towards filter disc setting.

8. vertical filter disc filter thickener according to claim 2, is characterized in that: described distributing valve comprises Moving plate and quiet dish; Described quiet dish is provided with at least two mouths of pipe, and wherein two mouths of pipe are connected with blowning installation with air extractor respectively, and described Moving plate is positioned at described quiet dish inner side, is connected with hollow spindle.

9. vertical filter disc filter thickener according to claim 2, is characterized in that: described filter disc adopts plastic material or metal material preparation, and described feed bin and distributing valve all adopt metal material preparation.

10. vertical filter disc filter thickener according to claim 9, is characterized in that: described metal material is stainless steel or carbon steel;

The alloy preparation that described stainless steel adopts that carbon content is 0.075%, silicone content is 0.94%, manganese content is 0.97%, phosphorus content is 0.035%, sulfur content is 0.025%, chromium content is 14.0%, surplus is iron, described percentage is percetage by weight;

Described carbon steel adopt with carbon content be 0.12～0.20%, silicone content for≤0.30%, manganese content is 0.30～0.70%, sulfur content for≤0.045%, phosphorus content for≤0.045%, prepared by all the other alloys that are iron, described percentage is percetage by weight.

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