CN205360710U - But dehydration of high moisture clean coal is with superhigh pressure piston varactor pressure filter after coal slime flotation - Google Patents

Abstract

The utility model discloses a but dehydration of high moisture clean coal is with superhigh pressure piston varactor pressure filter after coal slime flotation. It includes hydro -cylinder, hydro -cylinder seat, girder, pressure plate, thrust plate and a plurality of filter frame, the front end of filter frame, rear end are equipped with respectively and bulldoze board, bearing plate, it is equipped with a plurality of seal spring to bulldoze on same circumference between board and the bearing plate, bearing plate and filter plate mounting panel fixed connection, fixed filter plate and filter plate mounting panel fixed connection, fixed mounting has the piston axle on the fixed filter plate, ejecting filter plate and piston axle fixed connection, be equipped with ejecting spring between fixed filter plate and ejecting filter plate. The utility model discloses the improvement has been done on current superhigh pressure elasticity squeezer: through fixed mounting piston axle on fixed filter plate, the ejecting filter plate of the epaxial fixed mounting of piston again, but make original elasticity squeezer become piston varactor pressure filter, through set up ejecting spring between fixed filter plate and ejecting filter plate, realized that the filter cake unloads automatically.

Description

Ultra-high pressure piston type variable capacity filter press for dehydration of high water content clean coal after coal slime flotation

technical field

The utility model belongs to the technical field of filtration, and relates to an ultra-high pressure piston-type variable-capacity filter press for dehydrating high-water clean coal after coal slime flotation.

Background technique

Extracting clean clean coal with low sulfur and low ash content from waste coal slime by dosing flotation is a new technology for energy saving and environmental protection. Clean coal is directly dehydrated by filtration and separation equipment.

The applicant has been researching and developing filtration and separation equipment for high water content clean coal dehydration after coal slime flotation for three years. During this process, they visited major domestic manufacturers and users of filtration and separation equipment, and conducted different forms of cooperation with these manufacturers. Numerous small tests and pilot tests have been carried out on filtration and separation equipment such as drum vacuum filters, belt miscible presses, various centrifuges, box filter presses, and elastic plate and frame presses. A large amount of experimental data has been obtained. However, it was finally found that there is no existing equipment that can be directly applied to the dehydration, filtration and separation of high-water clean coal after coal slime flotation, and only the elastic plate and frame press is relatively close to its requirements. There are four main difficulties. One is that the water content of clean coal is required to be low, and the water content of clean coal after filtration is ≤9%; Large, ≥5.5MPa; Fourth, it should be able to automatically unload the mud cake.

However, existing filtration and separation equipment cannot meet these technological requirements, and the disadvantages of the prior art are as follows:

(1) The squeezing pressure is not enough, and the domestic squeezing pressure is ≤5MPa.

(2) The processing capacity is not enough. The largest processing capacity of the domestically produced elastic plate and frame press is the TCYZ200 (1770) model produced by Shanghai Tongchen Environmental Protection Co., Ltd., and its processing capacity is 4 tons/hour of dry mud.

(3) The water content cannot reach, and the water content of the filter cake of the existing press is more than or equal to 20%.

(4) Automatic unloading of the filter cake cannot be realized, especially when the moisture content of the clean coal is ≤9%, the filter cake is very dry and hard, and is often stuck in the gap of the filter plate.

(5) The depth of the filter chamber of the existing filtration and separation equipment is 10-30mm, the processing capacity is small, and the efficiency is low.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, and provide an ultra-high pressure piston-type dehydration machine for high-water clean coal dehydration after coal slime flotation, which is improved on the basis of the existing ultra-high pressure elastic press and can meet the process requirements. Variable capacity filter press.

The technical scheme of the utility model is as follows:

An ultra-high-pressure piston-type variable-capacity filter press for dehydrating high-water clean coal after slime flotation, which includes an oil cylinder, an oil cylinder seat, a main beam, a pressure plate, a thrust plate, and a pressure plate and a thrust plate There are several filter frames in between; the front and rear sides of the filter frame are respectively provided with a push plate and a pressure plate; there are several sealing springs on the same circumference between the push plate and the pressure plate; the pressure plate is fixed to the filter plate mounting plate Connection; the fixed filter plate is fixedly connected with the filter plate mounting plate; the fixed filter plate is fixedly installed with a piston shaft; the ejector filter plate is fixedly connected with the piston shaft; an ejector spring is arranged between the fixed filter plate and the ejector filter plate.

Four piston shafts are fixedly installed on the fixed filter plate; the four piston shafts are evenly distributed on the same circumference.

Four ejection springs are arranged on the same circumference between the fixed filter plate and the ejection filter plate; the four ejection springs are evenly distributed on the same circumference.

The beneficial effects of the utility model:

The ultra-high-pressure piston-type variable-capacity filter press for dehydrating high-moisture clean coal after coal slime flotation of the utility model has been improved as follows on the basis of the existing ultra-high-pressure elastic press: 1. The piston shaft is fixedly installed on the top of the piston shaft, and the ejector filter plate is fixedly installed on the piston shaft, so that the original elastic press machine becomes a piston type variable capacity filter press, which can meet the dehydration of high water content clean coal after slime flotation. Filtration separation process requirements. 2. By setting the ejection spring between the fixed filter plate and the ejection filter plate, the automatic unloading of the filter cake (spring unloading) is realized.

The ultra-high pressure piston-type variable capacity filter press for dehydrating high-water clean coal after coal slime flotation of the utility model has the following advantages:

(1) The maximum pressing pressure of the ultra-high pressure piston type variable capacity press is 6-9 MPa;

(2) After being dehydrated by the ultra-high pressure piston type variable capacity press, the moisture content of the clean coal is ≤9%;

(3) The clean coal processing capacity of the ultra-high-pressure piston variable-capacity press reaches 11-13 tons/hour of dry mud per unit; (4) The compression capacity of the ultra-high-pressure piston-type variable-capacity press can reach 15% to 20%;

(5) The plate frame of the ultra-high pressure piston type variable capacity press is specially designed with an automatic ejection and unloading device for filter cakes, which solves the problem that coal cakes are difficult to unload.

Description of drawings

Fig. 1 is the complete machine structure schematic diagram of ultra-high pressure piston type variable capacity filter press in the utility model;

Fig. 2 is a schematic view of the front structure of the filter frame assembly in the utility model;

Fig. 3 is a side view of the filter frame (into mud state) in the utility model;

Fig. 4 is a side view of the filter frame (unloading state) in the utility model.

In the figure: 1—mud inlet pipe, 2—thrust plate, 3—main beam, 4—filter frame, 5—pressure plate, 6—oil cylinder seat, 7—oil cylinder, 8—hydraulic station, 9—ear shoulder, 10 —roller, 11—pressure bearing plate, 12—fixed filter plate, 13—sealing spring, 14—filter plate mounting plate, 15—piston shaft, 16—ejection spring, 17—push plate, 18—ejection filter plate , 19—filter cloth

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

As shown in Figure 1, the utility model is an ultra-high pressure piston-type variable-capacity filter press for dehydrating high-water clean coal after coal slime flotation, which includes an oil cylinder 7, an oil cylinder seat 6, a main beam 3, a pressure plate 5, Thrust plate 2, and several filter frames 4 and other components arranged between pressure plate 5 and thrust plate 2.

As shown in Figure 3, the front and rear sides of the filter frame 4 are respectively provided with a pushing plate 17 and a pressure bearing plate 11; between the pushing plate 17 and the pressure bearing plate 11, several sealing springs 13 are arranged on the same circumference; the pressure bearing plate 11 is fixedly connected with the filter plate mounting plate 14; the fixed filter plate 12 is fixedly connected with the filter plate mounting plate 14; the fixed filter plate 12 is evenly distributed and fixedly installed with four piston shafts 15 on the same circumference; Root piston shaft 15 is fixedly connected; Between fixed filter plate 12 and ejection filter plate 18, be provided with four ejection springs 16 (two ejection springs 16 of upper and lower symmetry are drawn in Fig. 3) on the same circumference.

As shown in FIG. 2 , the filter frame assembly is provided with ear shoulders 9 and rollers 10 , so that the filter frame can be installed on the main beam 3 .

The working process includes four main processes: pre-pressing stage, feeding stage, pressing stage, and pulling plate unloading stage.

Preloading stage: start the hydraulic station 8 to drive the oil cylinder 7 to push the filter frame 4 to the side of the thrust plate 2, so that each filter frame 4 is tightly attached; as shown in Figure 3, the outer ring of the filter frame 4 is between the pressure plate frame and the The sealing spring 13 between the pushing plates and frames will be squeezed and shortened under the action of the oil cylinder pressure; the design value of the elastic range of the sealing spring 13 can be controlled at 10-30mm.

Feeding stage: the coal slurry is pumped into the filter frame 4 through the mud inlet pipe 1 through the plunger pump, the water seeps through the filter cloth 19, the coal slurry gradually fills the filter frame 4, and the concentration gradually increases. At the same time, the high concentration The coal slurry gradually generates pressure, pushing the ejection filter plate 18 to move inward, and the ejection spring 16 is compressed to absorb part of the potential energy; after the ejection spring 16 compresses part of the stroke, the back of the ejection filter plate 18 connected with it is connected to the filter plate. The board mounting board 14 fits together and does not retreat any more.

Squeezing stage: Start the oil cylinder 7 again, push the filter frame 4 toward the thrust plate 2, under the action of high pressure, the sealing spring 13 is further squeezed, as shown in Figure 3 and Figure 4, the depth of the filter chamber changes from the A=65~80mm is extruded to about B=30~50mm, the pressure can be increased to 5~9MPa, and the coal slurry is extruded into coal cake (filter cake); the moisture content of coal cake is reduced to about 10%~8%. .

Pull plate unloading stage: the oil cylinder 7 returns to its position, the force of the sealing spring 13 is released, the filter frame 4 returns to the free state, and the filter plates are pulled apart sequentially through the pull plate mechanism that comes with the equipment; 16 releases the potential energy, pushes the ejection filter plate 18 to shift, and this force can overcome the binding force between the briquette and the frame. In this way, the briquettes are naturally separated from the frame and come out of the filter frame to complete the unloading.

The main technical points of the ultra-high pressure piston type variable capacity filter press of the present invention are as follows:

1. Large volume, the compression amount can reach 15% to 20%;

2. High pressure, the pressing pressure can reach 5-9MPa;

3. The new auxiliary unloading method (spring unloading mud) can realize automatic unloading of filter cake.

Claims (5)

1. High water cut cleaned coal dehydration ultra-high pressure piston type variable capacity pressure filter after a coal slime flotation, it is characterised in that it includes oil cylinder, oil cylinder seat, girder, pressure plare, thrust plate, and is located at the some filter frames between pressure plare and thrust plate；The front end of filter frame, rear end are respectively equipped with push plate, bearing plate；On same circumference, some Packing springs it are provided with between push plate and bearing plate；Bearing plate is fixing with filter plate installing plate to be connected；Fixing filter plate is fixing with filter plate installing plate to be connected；Fixing filter plate is installed with piston shaft；Eject that filter plate and piston shaft are fixing to be connected；At fixing filter plate with eject and be provided with ejector spring between filter plate.

2. High water cut cleaned coal dehydration ultra-high pressure piston type variable capacity pressure filter after coal slime flotation as claimed in claim 1, it is characterised in that be installed with four piston shaft on fixing filter plate.

3. High water cut cleaned coal dehydration ultra-high pressure piston type variable capacity pressure filter after coal slime flotation as claimed in claim 2, it is characterised in that four piston shaft are uniformly distributed on same circumference.

4. High water cut cleaned coal dehydration ultra-high pressure piston type variable capacity pressure filter after the coal slime flotation as described in claim 1,2 or 3, it is characterised in that at fixing filter plate with eject and be provided with four ejector springs between filter plate on same circumference.

5. High water cut cleaned coal dehydration ultra-high pressure piston type variable capacity pressure filter after coal slime flotation as claimed in claim 4, it is characterised in that four ejector springs are evenly distributed on same circumference.