Bubble and pressurization combined dehydration equipment and process

Abstract

The invention relates to the technical field of filter cake dehydration, in particular to bubble and pressurization combined dehydration equipment and a bubble and pressurization combined dehydration process. The bubble and pressurization combined dehydration equipment comprises a pressing tool, a pressure applying assembly used for extruding slurry is arranged above the pressing tool, the pressure applying assembly comprises a pressure plate, and the top surface of the pressure plate is communicated with an inner cavity of the pressing tool through an air inlet flange and a medicine inlet flange; a first through hole is formed in one side of the pressing tool, a filtering assembly is arranged in the first through hole, and the side, deviating from the first through hole, of the pressing tool is fixedly connected and communicated with a slurry inlet pipe and a liquid discharging pipe; the air inlet flange is used for injecting air flow into the pressing tool, and the medicine inlet flange is used for injecting foaming agents into the pressing tool. Air flow and a foaming agent are injected into the pressing tool through the air inlet flange and the medicine inlet flange, stable bubbles begin to be generated in a filter cake subjected to primary filter pressing, particles can be extruded in the bubble generation process, moisture among the particles is discharged, then the filter cake is subjected to filter pressing again through the pressing disc, the dehydration rate of the filter cake is effectively increased, and the water content of the filter cake is reduced. And the water content of the filter cake is effectively reduced.

Description

Technical Field

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

[0002] Fine particles with a particle size of less than 20μm tend to form dense filter cakes with a porosity of less than 15%, resulting in a sudden drop in permeability. When traditional filter presses process such slurries, the moisture content of the filter cake is generally higher than 18%. Therefore, a dehydration process and equipment combining air bubbles and pressure is urgently needed to effectively improve 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 scheme: a dehydration device combining bubbles and pressure, comprising a pressurizing tool, a pressure component for squeezing mud is arranged above the pressurizing tool, the pressure component comprises a pressure plate, the top surface of the pressure plate is connected with the inner cavity of the pressurizing tool through an air inlet flange and a drug inlet flange respectively, a first through hole is opened on one side of the pressurizing tool, a filter component is arranged in the first through hole, and a side of the pressurizing tool away from the first through hole is fixedly connected and connected with a slurry inlet pipe and a liquid discharge pipe; the air inlet flange is used to inject airflow into the pressurizing tool, and the drug inlet flange is used to inject a foaming agent into the pressurizing tool.

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

[0007] Preferably, a cavity communicating with the air inlet flange and the drug 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 comprises a filter plate, and two sides of the filter plate are slidably connected with slide grooves, and the slide grooves are arranged on the side walls inside the pressing tool.

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

[0011] Preferably, the baffle is matched with the first through hole.

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

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

[0014] S1. Injecting slurry into the press through the slurry inlet pipe;

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

[0016] S3. After the filtration is completed, an air flow 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 inlet 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 filter pressing on the slurry in the pressing tool through a pressing plate. After the filter pressing is completed, an air flow and a foaming agent are injected into the pressing tool through an air inlet flange and a drug inlet flange. At this time, stable bubbles begin to be generated in the filter cake after the first filter pressing. During the bubble generation process, particles are squeezed to discharge moisture between the particles. Then, the filter cake is filter pressed again through the pressing 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 drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

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

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

[0023] Figure 3 It is a schematic diagram of the front view structure 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 It is a schematic diagram of the dehydration process of the present invention;

[0027] Among them, 1. press; 2. hydraulic cylinder; 3. press plate; 4. press plate; 5. filter plate; 6. bracket; 7. slurry inlet pipe; 8. discharge pipe; 9. air inlet flange; 10. medicine inlet flange; 11. first through hole; 12. slide groove; 13. baffle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 Figure 1-Figure 6 The present invention provides a dehydration device combining bubbles and pressure, including a pressurizing tool 1, a pressure component for squeezing mud is arranged above the pressurizing tool 1, and the pressure component includes a pressure plate 4, and the top surface of the pressure plate 4 is connected with the inner cavity of the pressurizing tool 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 pressurizing tool 1, and a filter component is arranged in the first through hole 11. The side of the pressurizing tool 1 away from the first through hole 11 is fixedly connected and connected with a slurry inlet pipe 7 and a liquid discharge pipe 8; the air inlet flange 9 is used to inject airflow into the pressurizing tool 1, and the drug inlet flange 10 is used to inject a foaming agent into the pressurizing tool 1.

[0031] The present invention performs filter pressing on the slurry in the pressing tool 1 through the pressing plate 4. After the filter pressing is completed, the air flow and the foaming agent are injected into the pressing tool 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 to discharge the moisture between the particles. Then, the filter cake is filter pressed again through the pressing 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] In a further optimized solution, a pressure plate 3 is fixedly connected to the center of the top surface of the pressure plate 4, and the end of the pressure plate 3 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 to press the mud in the press 1 through the pressure plate 3.

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

[0034] The bracket 6 is made of aluminum alloy material, which has high tensile strength and is also light in weight. 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 bars on both sides of the bracket 6. The honeycombs can further reduce the weight of the bracket 6, so that the press 1 can stably support the bracket 6.

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

[0036] In a further optimized solution, a plurality of second through holes are provided at the bottom of the cavity, which are connected to the pressing tool 1. Through the second through holes, the airflow and the foaming agent can effectively enter the mud.

[0037] Further optimizing the scheme, the filter assembly includes a filter plate 5, and the two sides of the filter plate 5 are respectively slidably connected with a slide groove 12, and the slide groove 12 is opened on the side wall of the pressing tool 1. The filter plate 5 is moved along the slide groove 12 to facilitate the installation and removal of the filter plate 5.

[0038] In a further optimized solution, the first through hole 11 is detachably connected with a baffle 13, and the baffle 13 is fixedly connected to the filter plate 5. A handle is installed on the baffle 13, and the installation and removal of the filter plate 5 are facilitated by the handle.

[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 plate 5, and the drain pipe 8 is arranged below the filter plate 5. The slurry entering through the slurry inlet pipe 7 can be effectively accumulated on the filter plate 5 in the press 1, and at the same time, the water filtered by the filter plate 5 is convenient to be discharged through the drain pipe 8.

[0041] A dehydration process combining air bubbles and pressurization, comprising the following steps:

[0042] S1. Inject mud into the press 1 through the slurry inlet pipe 7; that is, inject mud with a high water content into the press 1 through the slurry inlet pipe 7, and allow the mud injected into the press 1 to accumulate on the filter plate 5. After the mud is injected to a specified height, stop grouting.

[0043] S2. Perform initial filtration through the pressure plate 4; open the hydraulic cylinder 2, and the piston end of the hydraulic cylinder 2 drives the pressure plate 4 to press the mud in the press 1 through the pressure plate 3, and the water in the mud flows into the drain pipe 8 through the filter plate 5.

[0044] S3. After the filtration is completed, 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; at this time, stable bubbles begin to form in the filter cake after one filtration, and the particles are squeezed during the bubble generation process, removing part of the moisture between the particles.

[0045] S4. Perform secondary filtration again through the pressure plate 4. During the secondary filtration, the bubbles play the role of a skeleton, further improving the dehydration rate. The filtrate after filtration flows out through the drain pipe 8, and finally achieves deep dehydration of fine particles. After dehydration, the slurry after the secondary 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 terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A dehydration device combining air bubble and pressure, characterized in that: The invention comprises a pressing tool (1), wherein a pressure component for squeezing mud is arranged above the pressing tool (1), wherein the pressure component comprises a pressure plate (4), wherein the top surface of the pressure plate (4) is connected to the inner cavity of the pressing tool (1) through an air inlet flange (9) and a drug inlet flange (10), respectively; a first through hole (11) is provided on one side of the pressing tool (1), wherein a filter component is arranged in the first through hole (11); and a side of the pressing tool (1) away from the first through hole (11) is fixedly connected and connected to a mud inlet pipe (7) and a liquid discharge pipe (8); The air inlet flange (9) is used to inject air flow into the pressing tool (1), and the drug inlet flange (10) is used to inject a foaming agent into the pressing tool (1).

2. The dehydration device combining air bubble and pressure according to claim 1, characterized in that: A pressure plate (3) is fixedly connected to the center of the top surface of the pressure plate (4), and an 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 device combining air bubble 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 device combining air bubble and pressure according to claim 2, characterized in that: The pressure plate (4) is provided with a cavity which is in communication with the air inlet flange (9) and the medicine inlet flange (10), and a support column is fixedly connected to the center of the cavity.

5. The dehydration device combining air bubble 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 device combining air bubble 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 arranged on the side walls inside the pressing tool (1).

7. The dehydration device combining air bubble 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 plate (5).

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

9. The dehydration device combining air bubble 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).

10. A dehydration process combining air bubbles and pressure, based on the dehydration equipment combining air bubbles and pressure according to any one of claims 1 to 9, characterized in that: The following steps are involved: 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 pressure filtration again through the pressure plate (4).

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