CN2234811Y

CN2234811Y - Efficient plate-frame type filter press

Info

Publication number: CN2234811Y
Application number: CN 95232507
Authority: CN
Inventors: 余仁焕; 阎飞旗
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-19
Filing date: 1995-10-19
Publication date: 1996-09-11
Anticipated expiration: 2005-10-19

Abstract

The utility model discloses an efficient plate-frame type filter press, comprising a machine frame, a hydraulic device, filter frames, filter plates, a pulp inlet pipe and liquid drain pipes, and a plurality of filter frames and filter plates are ranged on the cross beam of the machine frame with intervals. The utility model is characterized in that an air compressing conduit is respectively arranged on the two filter liquor drain pipes, filter liquor holes are opened on both surfaces of each filter plate, each surface is provided with only one filter liquor hole, and each filter liquor hole is communicated with one filter liquor drain pipe. The utility model has the advantages of simple structure, the improvement of filtration rate, the reduction of the moisture of filterign cakes in greater extent, energy saving and the guarantee of filtering quality. The utility model can be used for dewatering operation in the technical fields such as foods, mines for metallurgy, petrochemical engineering, medicine, environmental protection, etc., and is suitable for filtering fine material which is difficult to filter.

Description

Efficient plate and frame type filter-press

The utility model relates to solid-liquid separation technique equipment, particularly a kind of efficient plate and frame type filter-press.

Plate and frame type filter-press is a kind of of filter press.Owing to realized the plate and frame type filter-press automation latter stage fifties.Increased press mechanism the latter stage sixties again, thereby it has obtained all in fields such as food, metallurgical mine, petrochemical industry, medicine, environmental protection widely using, but there is following shortcoming in existing plate and frame type filter-press:

1, after filtration was finished, it is saturated that the filter cake hole is entirely water institute, and saturation degree is 100%.

2, filter beginning, the filter cloth surface forms filter cake gradually, causes filtration resistance sharply to increase, and filtering rate sharply reduces, and in the most of the time thereafter, filters and is all carrying out under the low rate very much.

In view of the deficiency that prior art exists, the purpose of this utility model provides a kind of efficient plate and frame type filter-press that can reduce filter cake moisture by a relatively large margin and improve filtering rate.

For achieving the above object, the utility model is achieved through the following technical solutions.

Efficient plate and frame type filter-press comprises frame, hydraulic means, filter frame, filter plate, discharging tube, pulp-inlet pipe, a plurality of filter frames and filter plate are alternately on the crossbeam of frame, hydraulic means is with filter frame between front top plate and tailgate and filter plate compress alternately, its design feature is respectively to connect an air-pressure duct on two filtrate discharge pipes, and an outage is only established for every in the two sides of every filter plate, each communicates with a filtrate discharge pipe, with realization filter chamber is inflated.

The utility model compared with prior art has following advantage:

1, improves filtering rate, the saving energy.

2, can more significantly reduce filter cake moisture, thereby guarantee filter quality.

3, simple in structure, do not need increase equipment.

Once granularity was carried out experiment for the fine particles flotation iron ore concentrate that-74 μ m account for 93% (19 μ m account for 51%, and-110 μ m account for 33%), after press filtration became cake, blow 5 minutes (pressure 500kpa) can make filter cake moisture drop to 12-14% from 16-17%.

Once tested with above-mentioned test portion, as the filter cake that blows off without compressed air, in beginning filter 23 minute (total filtration time is 18 minutes), filtration resistance sharply increases, and filtering rate is fallen suddenly, near minimum, all turns round under low rate in 15 minutes thereafter; And be interrupted when blowing off filter cake with compressed air, average filtration speed improves nearly one times.

The dewatering operation that can be widely used in technical fields such as food, metallurgical mine, petrochemical industry, medicine, environmental protection is suitable for filtering the difficult filter of particulate material.

Embodiment is further described the utility model below in conjunction with accompanying drawing.

The filter press general structure schematic diagram that Fig. 1 provides for the utility model.

The filter press filter frame front view that Fig. 2 provides for the utility model.

Filter frame Fig. 2 of the filter press that Fig. 3 provides for the utility model is along A-A, B-B profile.

The filter plate front view of the filter press that Fig. 4 provides for the utility model.

Filter plate Fig. 4 of the filter press that Fig. 5 provides for the utility model is along C-C profile.

Filter plate Fig. 4 of the filter press that Fig. 6 provides for the utility model is along D-D profile.

As can be seen from Figure 1, filter press comprises frame 13, tailgate 3, front top plate 7, hydraulic means 8, filter frame 5, filter plate 4, pulp-inlet pipe 2, filtrate discharge pipe 10, air-pressure duct 12, filter frame and filter plate are alternately on the crossbeam 6 of frame, per two filter plates and a filter frame form filter chamber 15, from Fig. 2,3 as can be seen filter frame establish slurry intake channel 16, advance to starch vertical core 17, apocenosis passage 18, from Fig. 4,5,6 as can be seen, two sides at filter plate, every is provided with groove 20, slurry intake channel 19, filtrate hole 21, apocenosis passage 22.

During work, filter cloth 14 is layered on every filter plate two sides, utilize hydraulic means 8 with filter frame 5 between front top plate 7 and tailgate 3 and filter plate 4 compress alternately, form a series of independently filter chambers 15, open the valve 1 on the slurry conduit 2 into, make the high pressure filter pulp through slurry intake channel 16,19 vertical cores 17 that advance to starch by filter frame 5 tops enter filter chamber 15, under differential pressure action, filtrate sees through the filter cloth 14 of filter chamber both sides, moves down along the groove 20 of two side filter plates, through filter plate lower end outage 21, enter apocenosis passage 22, discharged by two draining pipes 10 that are located at the filter bottom, the solid particle in the filter pulp is then held back for filter cloth, forms filter cake in filter chamber gradually.

In above-mentioned filter process, but alternately, intermittently with one in two draining pipes in filter press bottom, in filter chamber, import compressed air, close the valve 9 that is located on this draining pipe 10 this moment, open the valve 11 that is located on the air-pressure duct 12, (pressure ratio is advanced to starch pressure big 50-100kpa) and is entered between filter cloth and the filter plate along the filtrate hole on former apocenosis passage and the filter plate, and the filter cake on the filter cloth of air inlet one side is blown off to make compressed air.Simultaneously, another root discharging tube continues to discharge filtrate.After filter cake blew off, valve-off 11 stopped air inlet, opened valve 9, continued the both sides discharge opeing and filtered.After the some time, from another root discharging tube, import compressed air, the opposite side filter cake that blows off, so off and on, deposition filter cake several times on the filter cloth that blows off move filtration stream all the time under lower resistance, two-forty.This kind method is called " restriction cake layer growth method ".After press filtration becomes cake, stop into slurry, close the valve 1 that is located on the pulp-inlet pipe.At this moment, utilize any discharging tube 10 to import compressed air, air sees through air inlet side filter cloth, force the capillary water in the filter cake hole to move to the opposite side filter plate, filtrate enters apocenosis passage from the filtrate hole 21 that communicates with this side filter plate, by discharging in another root discharging tube after seeing through filter cloth, reduce the filter cake saturation degree thus, promptly further reduced filter cake moisture.

Claims

1, a kind of efficient plate and frame type filter-press, comprise frame, hydraulic means, filter frame, filter plate, pulp-inlet pipe, discharging tube, a plurality of filter frames, filter plate are alternately on housiung separator, hydraulic means will be alternately the filter frame between front top plate and tailgate and filter plate compress, it is characterized in that: on two filtrate discharge pipes, respectively establish an air-pressure duct, the two sides on every filter plate, only establish an outage for every, each communicates with a filtrate discharge pipe.