Micro-nano bubble multistage flotation device

Abstract

The utility model relates to the technical field of flotation, and particularly discloses a micro-nano bubble multistage flotation device. According to the micro-nano bubble multi-stage flotation device, bubble water return ports of a first-stage rotational flow air flotation machine and a second-stage rotational flow air flotation machine are connected with outlets of first-stage micro-nano bubble equipment and second-stage micro-nano bubble equipment respectively, a water inlet of the first-stage rotational flow air flotation machine is connected with a first-stage rotational flow air flotation water inlet pump, and a slag discharge port of the first-stage rotational flow air flotation machine is communicated with a waste slag collecting tank; the water outlet is communicated with the primary anti-settling circulating tank; a water outlet of the first-stage anti-settling circulating tank is connected with a second-stage rotational flow air floatation water inlet pump, a water outlet of the second-stage rotational flow air floatation water inlet pump is connected with a second-stage rotational flow air floatation machine, a slag discharging opening of the second-stage rotational flow air floatation machine is communicated with the waste slag collecting tank, and a water outlet of the second-stage rotational flow air floatation machine is communicated with the second-stage anti-settling circulating tank. The device is reasonable in structural design, capable of achieving multiple cyclone flotation, large in treatment capacity, high in treatment speed, suitable for flotation separation of different components in ore pulp and capable of being used for separation of pollutants such as suspended particulate matter and oil in industrial sewage.

Description

Technical Field

[0001] This utility model relates to the field of flotation technology, and in particular to a micro-nano bubble multi-stage flotation device. Background Technology

[0002] Flotation is a mineral processing technique based on differences in mineral surface properties. During flotation, air bubbles play a crucial role, selectively enriching minerals through adhesion to mineral particles. Specifically, hydrophobic mineral particles readily adhere to air bubbles and rise to the froth layer, while hydrophilic particles do not easily adhere to air bubbles and ultimately settle in the solution as tailings.

[0003] Multi-stage flotation refers to the process of treating raw ore through multiple flotation stages, using different mineral separation techniques to achieve selective enrichment of minerals. This process is particularly suitable for ores such as lithium ore that are often associated with other minerals. By using segmented and graded processing methods, the grade and purity of lithium ore can be significantly improved.

[0004] In multi-stage flotation, the size of the bubble has a significant impact on flotation efficiency. Nanobubble flotation technology utilizes tiny bubbles with sizes ranging from hundreds of nanometers. Due to their huge surface area and unique surface and hydrodynamic properties, they can significantly improve flotation efficiency. In addition, nanobubbles have characteristics such as large specific surface area, large contact angle, and slow bubble rise velocity, which help maintain bubble stability, thereby improving flotation efficiency.

[0005] Therefore, bubbles play a crucial role in multi-stage flotation. While nanobubbles are used in multi-stage flotation in existing technologies, their application is not widespread due to the high cost of nanobubble foaming; furthermore, there is no integrated equipment for nanobubble flotation in existing technologies. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this utility model provides a micro-nano bubble multi-stage flotation device with high structural integration, high flotation efficiency, and wide application.

[0007] This utility model is achieved through the following technical solution:

[0008] A multi-stage micro / nano bubble flotation device includes a primary cyclone flotation unit and a secondary cyclone flotation unit mounted side-by-side on a skid. Each cyclone flotation unit has an inlet, an outlet, a slag discharge port, and a bubble return port. The inlet of the primary cyclone flotation unit is connected to a primary cyclone flotation feed pump. The device is characterized in that: the bubble return port of the primary cyclone flotation unit is connected to the outlet of the primary micro / nano bubble flotation unit; its slag discharge port is connected to a waste collection tank via a pipe; and its outlet is connected to the inlet of a primary anti-settling circulation tank via a pipe. The outlet of the primary anti-settling circulation tank is connected to the secondary cyclone flotation feed pump; the outlet of the secondary cyclone flotation feed pump is connected to the inlet of the secondary cyclone flotation unit; the bubble return port of the secondary cyclone flotation unit is connected to the outlet of the secondary micro / nano bubble flotation unit; its slag discharge port is connected to a waste collection tank via a pipe; and its outlet is connected to the inlet of the secondary anti-settling circulation tank via a pipe.

[0009] This invention assembles two parallel cyclone flotation machines on the same equipment skid and connects them in series with corresponding water pumps and circulating tanks to achieve graded flotation of mineral particles. At the same time, this invention equips the cyclone flotation machine with micro-nano bubble equipment, which introduces micro-nano bubbles into its interior to achieve a significant improvement in flotation efficiency.

[0010] The preferred technical solution of this utility model is as follows:

[0011] An electrical control cabinet is fixed on the bottom skid of the equipment. The electrical control cabinet is connected to the first-stage cyclone flotation machine, the second-stage cyclone flotation machine, the first-stage cyclone flotation inlet pump, the second-stage cyclone flotation inlet pump, the first-stage micro-nano bubble device, the second-stage micro-nano bubble device, the first-stage anti-settling circulation tank, the second-stage anti-settling circulation tank, and the waste residue collection tank. The cabinet monitors and controls the operation of the above-mentioned equipment in real time to ensure safe and stable operation.

[0012] The inlet of the first-stage vortex air flotation water pump is connected to the system's water inlet pipe. Several branch water pipes are installed on the system's water inlet pipe, and water inlets are installed at the ends of the branch water pipes. The water inlets are connected to the inlets of the first-stage micro-nano bubble device and the second-stage micro-nano bubble device, respectively. Water is drawn from the system's water inlet pipe through the water inlets and enters the two-stage micro-nano bubble devices to generate micro-nano bubbles for use by the vortex air flotation machine.

[0013] The first-stage cyclone flotation unit is equipped with an inlet valve at its inlet, an external discharge valve at its slag discharge port, and an outlet valve at its outlet, and has a liquid level sensor installed inside. The second-stage cyclone flotation unit is also equipped with an inlet valve at its inlet, an external discharge valve at its slag discharge port, and an outlet valve at its outlet, and has a liquid level sensor installed inside. Corresponding control valves are installed at the inlet and outlet of the above devices to facilitate the setting of specific processes according to the specific flotation medium.

[0014] Preferably, the inlet valve, outlet valve, and level sensor are connected to the electrical control cabinet to collect, analyze, and output control signals.

[0015] Both the primary and secondary anti-settling circulation tanks are equipped with agitators and level sensors located on the inner wall. The agitators are used to prevent sedimentation in the circulation tanks, so as to facilitate the subsequent treatment of the produced water.

[0016] The outlet of the secondary anti-settling circulation tank is connected to an external discharge pump, which discharges the water from the system for reuse.

[0017] The waste collection tank is equipped with a stirring device, and the stirring motor connected to the stirring device is installed on the top of the waste collection tank. A liquid level sensor is installed on the inner wall of the waste collection tank to prevent the waste from settling in the collection tank for a long time and becoming difficult to remove.

[0018] This utility model has a reasonable structural design, multiple cyclone flotation, large processing capacity, and fast processing speed. It is suitable for the flotation separation of different components in mineral slurry, and can also be used for the separation of suspended particulate matter, oil and other pollutants in industrial wastewater. It has low operating costs and high separation efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a top view of the structure of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0023] In the diagram, 1 is the equipment skid, 2 is the primary cyclone flotation machine, 3 is the secondary cyclone flotation machine, 4 is the primary micro-nano bubble equipment, 5 is the secondary micro-nano bubble equipment, 6 is the primary cyclone flotation inlet pump, 7 is the secondary cyclone flotation inlet pump, 8 is the waste collection tank, 9 is the primary anti-settling circulation tank, 10 is the secondary anti-settling circulation tank, 11 is the electrical control cabinet, 12 is the mixer, and 13 is the external discharge pump. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The present invention will now be described in detail with reference to the accompanying drawings: This embodiment includes a primary cyclone flotation unit 2 and a secondary cyclone flotation unit 3 mounted side-by-side on a equipment skid 1. The primary cyclone flotation unit 2 and the secondary cyclone flotation unit 3 are respectively provided with an inlet, an outlet, a slag discharge outlet, and a bubble return outlet. The bubble return outlet of the primary cyclone flotation unit 2 is connected to the outlet of the primary micro-nano bubble device 4, and the bubble return outlet of the secondary cyclone flotation unit 3 is connected to the outlet of the secondary micro-nano bubble device 5. The inlet of the air flotation machine 2 is connected to the first-stage cyclone air flotation inlet pump 6, its slag discharge port is connected to the waste slag collection tank 8 through a pipeline, and its outlet is connected to the inlet of the first-stage anti-settling circulation tank 9 through a pipeline; the outlet of the first-stage anti-settling circulation tank 9 is connected to the second-stage cyclone air flotation inlet pump 7, the outlet of the second-stage cyclone air flotation inlet pump 7 is connected to the inlet of the second-stage cyclone air flotation machine 3, the slag discharge port of the second-stage cyclone air flotation machine 3 is connected to the waste slag collection tank 8 through a pipeline, and its outlet is connected to the inlet of the second-stage anti-settling circulation tank 10 through a pipeline.

[0027] An electrical control cabinet 11 is fixed on the equipment skid 1. The electrical control cabinet 1 is connected to the first-stage cyclone flotation machine 2, the second-stage cyclone flotation machine 3, the first-stage cyclone flotation inlet pump 6, the second-stage cyclone flotation inlet pump 7, the first-stage micro-nano bubble device 4, the second-stage micro-nano bubble device 5, the first-stage anti-settling circulation tank 9, the second-stage anti-settling circulation tank 10, and the waste residue collection tank 8.

[0028] The inlet of the first-stage cyclone flotation inlet pump 6 is connected to the system inlet pipe. Several branch pipes are installed on the system inlet pipe, and water inlets are installed at the ends of the branch pipes. The water inlets are connected to the inlets of the first-stage micro-nano bubble device 4 and the second-stage micro-nano bubble device 5, respectively. An inlet valve is installed on the inlet of the first-stage cyclone flotation machine 2, an external discharge valve is installed on its slag discharge port, and an outlet valve is installed on its outlet. A liquid level sensor is installed inside the machine. An inlet valve is installed on the inlet of the second-stage cyclone flotation machine 3, an external discharge valve is installed on its slag discharge port, and an outlet valve is installed on its outlet. A liquid level sensor is installed inside the machine. The inlet valve, external discharge valve, outlet valve, and liquid level sensor are respectively connected to the electrical control cabinet 1.

[0029] Both the primary anti-settling circulation tank 9 and the secondary anti-settling circulation tank 10 are equipped with a mixer 12 and a liquid level sensor located on the inner wall; the outlet of the secondary anti-settling circulation tank 10 is connected to the external discharge pump 13; the waste residue collection tank 8 is equipped with a stirring device, and the stirring motor connected to the stirring device is installed on the top of the waste residue collection tank 8, and a liquid level sensor is installed on the inner wall of the waste residue collection tank 8.

[0030] The operating principle of this utility model is as follows:

[0031] Raw water enters the system through the inlet of the first-stage cyclone flotation inlet pump 6. After being pressurized by the first-stage cyclone flotation inlet pump 6, it enters the first-stage cyclone flotation machine 2 through the inlet. The first-stage micro-nano bubble device 4 takes water from the water intake of the system's water inlet pipe and adds air to the raw water to generate micro-nano bubble water. The water returns to the first-stage cyclone flotation machine 2 through the bubble return port. Through continuous circulation, micro-nano bubbles are continuously added to the first-stage cyclone flotation machine 2. The raw water with added micro-nano bubbles is separated into waste residue and product water in the first-stage cyclone flotation machine 2. The waste residue is discharged into the waste residue collection tank 8 through the slag discharge port of the first-stage cyclone flotation machine 2, and the product water enters the first-stage anti-settling circulation tank 9 through the outlet of the first-stage cyclone flotation machine 2. The first-stage anti-settling circulation tank 9 is equipped with a stirrer 12 to prevent sedimentation in the tank.

[0032] The intermediate water in the primary anti-settling circulation tank 9 is buffered and then pressurized by the secondary cyclone flotation inlet pump 7 before entering the secondary cyclone flotation machine 3 through the inlet. The secondary micro-nano bubble device 5 takes water from the water inlet of the system's inlet pipe, adds air to the water to generate micro-nano bubbles, and returns them to the secondary cyclone flotation machine 3 through the bubble recovery port. Micro-nano bubbles are continuously added to the secondary cyclone flotation machine 3 through continuous circulation. The intermediate water with added micro-nano bubbles is separated into waste residue and product water in the secondary cyclone flotation machine 3. The waste residue is discharged into the waste residue collection tank 8 through the slag discharge port, and the product water enters the secondary anti-settling circulation tank 10 through the outlet.

[0033] The produced water in the secondary anti-settling circulation tank 10 is discharged from the system through the external discharge pump 13 for reuse of intermediate water.

[0034] This utility model device can be used not only for the flotation separation of different components in mineral slurry, but also for the separation of suspended particulate matter, oil and other pollutants in industrial wastewater, with high separation effect and high flotation efficiency.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A micro-nano bubble multi-stage flotation device, comprising a primary cyclone flotation unit (2) and a secondary cyclone flotation unit (3) mounted in parallel on a skid (1), wherein the primary cyclone flotation unit (2) and the secondary cyclone flotation unit (3) are respectively provided with an inlet, an outlet, a slag discharge port and a bubble return port, and the inlet of the primary cyclone flotation unit (2) is connected to a primary cyclone flotation inlet pump (6), characterized in that: The bubble return port of the first-stage cyclone flotation machine (2) is connected to the outlet of the first-stage micro-nano bubble device (4), its slag discharge port is connected to the waste slag collection tank (8) through a pipe, and its water outlet is connected to the inlet of the first-stage anti-settling circulation tank (9) through a pipe; the water outlet of the first-stage anti-settling circulation tank (9) is connected to the second-stage cyclone flotation inlet pump (7), the water outlet of the second-stage cyclone flotation inlet pump (7) is connected to the inlet of the second-stage cyclone flotation machine (3), the bubble return port of the second-stage cyclone flotation machine (3) is connected to the outlet of the second-stage micro-nano bubble device (5), its slag discharge port is connected to the waste slag collection tank (8) through a pipe, and its water outlet is connected to the inlet of the second-stage anti-settling circulation tank (10) through a pipe.

2. The micro / nano bubble multi-stage flotation device as described in claim 1, characterized in that: An electrical control cabinet (11) is fixed on the equipment skid (1). The electrical control cabinet (11) is connected to the first-stage cyclone flotation machine (2), the second-stage cyclone flotation machine (3), the first-stage cyclone flotation water inlet pump (6), the second-stage cyclone flotation water inlet pump (7), the first-stage micro-nano bubble device (4), the second-stage micro-nano bubble device (5), the first-stage anti-settling circulation tank (9), the second-stage anti-settling circulation tank (10), and the waste residue collection tank (8).

3. The micro / nano bubble multi-stage flotation device as described in claim 1, characterized in that: The inlet of the first-stage vortex air flotation water pump (6) is connected to the system water inlet pipe. Several branch water pipes are provided on the system water inlet pipe. Water inlets are provided at the ends of the branch water pipes. The water inlets are respectively connected to the inlet of the first-stage micro-nano bubble device (4) and the inlet of the second-stage micro-nano bubble device (5).

4. The micro / nano bubble multi-stage flotation device as described in claim 2, characterized in that: The first-stage cyclone flotation machine (2) is equipped with an inlet valve at its inlet, an external discharge valve at its slag discharge port, an outlet valve at its outlet, and a liquid level sensor inside. The second-stage cyclone flotation machine (3) is equipped with an inlet valve at its inlet, an external discharge valve at its slag discharge port, an outlet valve at its outlet, and a liquid level sensor inside.

5. The micro / nano bubble multi-stage flotation device as described in claim 4, characterized in that: The inlet valve, outlet valve, and level sensor are respectively connected to the electrical control cabinet (11).

6. The micro / nano bubble multi-stage flotation device as described in claim 2, characterized in that: Both the primary anti-sinking circulation tank (9) and the secondary anti-sinking circulation tank (10) are equipped with a mixer (12) and a liquid level sensor located on the inner wall.

7. The micro / nano bubble multi-stage flotation device as described in claim 1, characterized in that: The outlet of the secondary anti-sinking circulation tank (10) is connected to the external discharge pump (13).

8. The micro / nano bubble multi-stage flotation device as described in claim 2, characterized in that: The waste collection tank (8) is equipped with a stirring device, and the stirring motor connected to the stirring device is installed on the top of the waste collection tank (8). A liquid level sensor is installed on the inner wall of the waste collection tank (8).

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