A dehydration device and process combining bubbles with pressurization

Abstract

The present invention relates to the field of filter cake dehydration technology, and in particular to a dehydration device and process combining air bubbles and pressure, comprising a press, a pressure assembly for squeezing slurry is provided above the press, the pressure assembly comprises a pressure plate, the top surface of the pressure plate is connected to the inner cavity of the press through an air inlet flange and a drug inlet flange, a first through hole is provided on one side of the press, a filter assembly is provided in the first through hole, a side of the press facing away from the first through hole is fixedly connected and connected to a slurry inlet pipe and a liquid discharge pipe; the air inlet flange is used to inject airflow into the press, and the drug inlet flange is used to inject a foaming agent into the press. The present invention injects airflow and foaming agent into the press through the air inlet flange and the drug inlet flange, and stable bubbles begin to be generated in the filter cake after one filtration. During the bubble generation process, particles are squeezed and moisture between particles is discharged. Then, the filter cake is filtered again by the pressure plate, which not only effectively improves the dehydration rate of the filter cake, but also effectively reduces the moisture content of the filter cake.

Description

Technical Field

[0001] The invention relates to the technical field of filter cake dehydration, in particular to dehydration equipment and process combining air bubbles and pressure. Background Art

[0002] Fine particles with a size of less than 20 μm tend to form a dense filter cake with a porosity of less than 15%, resulting in a sharp drop in permeability. When traditional filter presses process this type of slurry, the filter cake moisture content is generally higher than 18%. Therefore, a dehydration process and equipment that combines air bubbles and pressure is urgently needed to effectively increase the dehydration rate and reduce the moisture content. Summary of the Invention

[0003] The purpose of the present invention is to provide a dehydration device and process combining air bubbles and pressure to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: a dehydration device combining bubbles and pressure, comprising a press, a pressure component for squeezing the mud is arranged above the press, the pressure component comprises a pressure plate, the top surface of the pressure plate is connected to the inner cavity of the press through an air inlet flange and a drug inlet flange respectively, a first through hole is opened on one side of the press, a filter component is arranged in the first through hole, and the side of the press away from the first through hole is fixedly connected and connected to a slurry inlet pipe and a liquid discharge pipe; the air inlet flange is used to inject air flow into the press, and the drug inlet flange is used to inject a foaming agent into the press.

[0005] Preferably, a pressure plate is fixedly connected to the center of the top surface of the pressure plate, and an end of the pressure plate facing away from the pressure plate is fixedly connected to the piston end of the hydraulic cylinder.

[0006] Preferably, the fixed end of the hydraulic cylinder is fixedly connected to a bracket, and the bracket is fixedly connected to the pressing tool.

[0007] Preferably, a cavity communicating with the air inlet flange and the medicine inlet flange is provided in the pressure plate, and a support column is fixedly connected to the center of the cavity.

[0008] Preferably, a plurality of second through holes communicating with the pressing tool are formed at the bottom of the cavity.

[0009] Preferably, the filter assembly includes a filter disc, and both sides of the filter disc are slidably connected with a slide groove, and the slide groove is opened on the side wall inside the pressing tool.

[0010] Preferably, the first through hole is detachably connected to a baffle, and the baffle is fixedly connected to the filter disc.

[0011] Preferably, the baffle is adapted to the first through hole.

[0012] Preferably, the slurry inlet pipe is arranged above the filter disc, and the liquid discharge pipe is arranged below the filter disc.

[0013] A dehydration process combining air bubbles and pressurization, comprising the following steps:

[0014] S1. The slurry is injected into the press through the slurry inlet pipe;

[0015] S2. performing a primary filtration by the pressure plate;

[0016] S3. After the filtration is completed, air is injected into the press through the air inlet flange, and at the same time, a foaming agent is injected into the press through the drug feed flange;

[0017] S4. Perform pressure filtration again through the pressure plate.

[0018] The present invention discloses the following technical effects:

[0019] The present invention performs pressure filtration on the slurry in the press tool through a pressure plate. After the pressure filtration is completed, air flow and a foaming agent are injected into the press tool through the air inlet flange and the drug inlet flange. At this time, stable bubbles begin to be generated in the filter cake after the first pressure filtration. The particles will be squeezed during the bubble generation process, and the moisture between the particles will be discharged. Then, the filter cake is pressure filtered again through the pressure plate, which not only effectively improves the dehydration rate of the filter cake, but also effectively reduces the moisture content of the filter cake. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a rear view structural diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the front view of the pressing tool of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the pressure plate of the present invention when viewed from above;

[0025] Figure 5 This is a schematic diagram of the filter disc structure of the present invention;

[0026] Figure 6 Schematic diagram of the dehydration process of the present invention;

[0027] Among them, 1. Pressing tool; 2. Hydraulic cylinder; 3. Pressing plate; 4. Pressing plate; 5. Filter plate; 6. Bracket; 7. Slurry inlet pipe; 8. Liquid discharge pipe; 9. Air inlet flange; 10. Drug inlet flange; 11. First through hole; 12. Slide groove; 13. Baffle. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1 - 6 The present invention provides a dehydration device combining bubbles and pressure, including a press 1, a pressure assembly for squeezing the slurry is arranged above the press 1, and the pressure assembly includes a pressure plate 4, the top surface of the pressure plate 4 is connected to the inner cavity of the press 1 through an air inlet flange 9 and a drug inlet flange 10 respectively, a first through hole 11 is opened on one side of the press 1, a filter assembly is arranged in the first through hole 11, and the side of the press 1 away from the first through hole 11 is fixedly connected and connected to a slurry inlet pipe 7 and a liquid discharge pipe 8; the air inlet flange 9 is used to inject air flow into the press 1, and the drug inlet flange 10 is used to inject a foaming agent into the press 1.

[0031] The present invention performs filter pressing on the slurry in the press 1 through the pressure plate 4. After the filter pressing is completed, air flow and foaming agent are injected into the press 1 through the air inlet flange 9 and the drug inlet flange 10. At this time, stable bubbles begin to be generated in the filter cake after the first filter pressing. The particles will be squeezed during the bubble generation process, and the moisture between the particles will be discharged. Then, the filter cake is filter pressed again through the pressure plate 4, which not only effectively improves the dehydration rate of the filter cake, but also effectively reduces the moisture content of the filter cake.

[0032] To further optimize the solution, the center of the top surface of the pressure plate 4 is fixedly connected to the pressure plate 3, and the end of the pressure plate 3 facing away from the pressure plate 4 is fixedly connected to the piston end of the hydraulic cylinder 2. The piston end of the hydraulic cylinder 2 drives the pressure plate 4 through the pressure plate 3 to press the mud in the press 1.

[0033] To further optimize the solution, the fixed end of the hydraulic cylinder 2 is fixedly connected to a bracket 6, which is fixedly connected to the pressing tool 1. The bracket 6 can stably position the hydraulic cylinder 2 above the pressing tool 1 and stably drive the pressure plate 4 to move.

[0034] The bracket 6 is made of aluminum alloy material. The aluminum alloy material has a relatively high tensile strength and at the same time, the weight of the aluminum alloy material itself is relatively light. At the same time, in order to effectively reduce the weight of the bracket 6, a number of honeycombs are respectively provided on the vertical rods on both sides of the bracket 6. Through the honeycombs, the weight of the bracket 6 can be further reduced, so that the press tool 1 can stably support the bracket 6.

[0035] In a further optimized solution, a cavity communicating with the air inlet flange 9 and the medicine inlet flange 10 is provided in the pressure plate 4, and a support column is fixedly connected to the center in the cavity. Through the support column, the pressure plate 4 can bear a relatively large pressure and ensure the rigidity of the pressure plate 4, so that the hydraulic cylinder 2 can apply a relatively large pressure.

[0036] In a further optimized solution, a number of second through holes communicating with the press tool 1 are provided at the bottom in the cavity. Through the second through holes, the air flow and the foaming agent can effectively enter the interior of the mud.

[0037] In a further optimized solution, the filter assembly includes a filter wire mesh plate 5, and both sides of the filter wire mesh plate 5 are respectively slidably connected to sliding grooves 12, and the sliding grooves 12 are provided on the side walls inside the press tool 1. Through the movement of the filter wire mesh plate 5 along the sliding grooves 12, it is convenient for the installation and disassembly of the filter wire mesh plate 5.

[0038] In a further optimized solution, the first through hole 11 is detachably connected to a baffle 13, and the baffle 13 is fixedly connected to the filter wire mesh plate 5. A handle is installed on the baffle 13, and through the handle, it is convenient for the installation and disassembly of the filter wire mesh plate 5.

[0039] In a further optimized solution, the baffle 13 is adapted to the first through hole 11. So that the baffle 13 can be effectively installed in the first through hole 11.

[0040] In a further optimized solution, the slurry inlet pipe 7 is arranged above the filter wire mesh plate 5, and the drain pipe 8 is arranged below the filter wire mesh plate 5. So that the slurry entering through the slurry inlet pipe 7 can effectively accumulate on the filter wire mesh plate 5 inside the press tool 1. At the same time, the water filtered by the filter wire mesh plate 5 is convenient to be discharged through the drain pipe 8.

[0041] A dehydration process combining bubbles and pressurization includes the following steps:

[0042] S1. Inject the slurry into the press tool 1 through the slurry inlet pipe 7; that is, pour the slurry with a relatively high water content into the press tool 1 through the slurry inlet pipe 7, and make the slurry injected into the press tool 1 accumulate on the filter wire mesh plate 5. After the slurry is poured to the specified height, stop grouting.

[0043] S2. Conduct primary pressure filtration through the pressure plate 4; start the hydraulic cylinder 2, and the piston end of the hydraulic cylinder 2 drives the pressure plate 4 through the pressing plate 3 to apply pressure to the slurry inside the press tool 1, and the water in the slurry flows into the drain pipe 8 through the filter wire mesh plate 5.

[0044] S3. After the pressure filtration is completed, air flow is injected into the press tool 1 through the air inlet flange 9. Meanwhile, a foaming agent is injected into the press tool 1 through the medicine inlet flange 10. At this time, stable foams begin to form in the filter cake after the first pressure filtration. During the bubble generation process, the particles will be squeezed, and part of the moisture between the particles will be excluded.

[0045] S4. Press filtration is carried out again through the pressure plate 4. During the second pressure filtration, the bubbles play the role of a skeleton again, further improving the dehydration rate. The filtrate after the pressure filtration flows out along the drain pipe 8, and finally deep dehydration of fine particles is achieved. After the dehydration is completed, the slurry after the second pressure filtration becomes a filter cake and is taken out from the filter cake pressure plate.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0047] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A dehydration process combining air bubbles and pressure, using dehydration equipment combining air bubbles and pressure, characterized by: The dewatering device combined with air bubbles and pressure includes a press (1), a pressure component for squeezing mud is provided above the press (1), the pressure component includes a pressure plate (4), the top surface of the pressure plate (4) is connected to the inner cavity of the press (1) through an air inlet flange (9) and a drug inlet flange (10), a first through hole (11) is provided on one side of the press (1), a filter component is provided in the first through hole (11), and a side of the press (1) away from the first through hole (11) is fixedly connected and connected to a slurry inlet pipe (7) and a liquid discharge pipe (8); The air inlet flange (9) is used to inject airflow into the pressing tool (1), and the drug inlet flange (10) is used to inject a foaming agent into the pressing tool (1); The dehydration process combining air bubbles and pressure includes the following steps: S1. Injecting slurry into the press (1) through the slurry inlet pipe (7); S2. performing a primary filtration through the pressure plate (4); S3. After the filtration is completed, an air flow is injected into the press (1) through the air inlet flange (9), and at the same time, a foaming agent is injected into the press (1) through the drug inlet flange (10); S4. Perform filtration again through the pressure plate (4).

2. The dehydration process combining air bubbles and pressure according to claim 1, characterized in that: The center of the top surface of the pressure plate (4) is fixedly connected to a pressure plate (3), and one end of the pressure plate (3) facing away from the pressure plate (4) is fixedly connected to the piston end of the hydraulic cylinder (2).

3. The dehydration process combining air bubbles and pressure according to claim 2, characterized in that: The fixed end of the hydraulic cylinder (2) is fixedly connected to a bracket (6), and the bracket (6) is fixedly connected to the pressing tool (1).

4. The dehydration process combining air bubbles and pressure according to claim 2, characterized in that: A cavity communicating with the air inlet flange (9) and the medicine inlet flange (10) is provided in the pressure plate (4), and a support column is fixedly connected to the center of the cavity.

5. The dehydration process combining air bubbles and pressure according to claim 4, characterized in that: A plurality of second through holes connected to the pressing tool (1) are provided at the bottom of the cavity.

6. The dehydration process combining air bubbles and pressure according to claim 1, characterized in that: The filter assembly comprises a filter plate (5), and two sides of the filter plate (5) are respectively slidably connected with slide grooves (12), and the slide grooves (12) are opened on the side walls inside the pressing tool (1).

7. The dehydration process combining air bubbles and pressure according to claim 6, characterized in that: The first through hole (11) is detachably connected to a baffle (13), and the baffle (13) is fixedly connected to the filter disc (5).

8. The dehydration process combining air bubbles and pressure according to claim 7, characterized in that: The baffle (13) is adapted to the first through hole (11).

9. The dehydration process combining air bubbles and pressure according to claim 6, characterized in that: The slurry inlet pipe (7) is arranged above the filter screen plate (5), and the liquid discharge pipe (8) is arranged below the filter screen plate (5).

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