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CN-122006535-A - High-concentration micro-nano foam preparation device and preparation method thereof

CN122006535ACN 122006535 ACN122006535 ACN 122006535ACN-122006535-A

Abstract

The invention discloses a high-concentration micro-nano foam preparation device and a preparation method thereof, the device comprises a liquid storage tank, a delivery pump, a micro-nano foam preparation unit and a micro-nano foam separation and recovery unit, a first baffle plate at the bottom is arranged in the liquid storage tank, the micro-nano foam preparation unit is connected with the delivery pump and arranged on the side edge of the liquid storage tank, and the micro-nano foam separation and recovery unit is integrated on the upper part of the liquid storage tank and comprises a second baffle plate, a micro-nano foam collecting tank, a foam overflow plate and a foam discharge liquid return pipe. According to the invention, the micro-nano foam separation and recovery unit is arranged, and the foam overflow plate and the foam discharge liquid return pipe are utilized to guide the foaming liquid separated out by utilizing the gravity liquid discharge effect back to the liquid storage tank, so that the gas-liquid separation is effectively realized, and the dryness and concentration of discharged foam are obviously improved. The device has compact structure and low energy consumption, the particle size of the prepared micro-nano foam is concentrated to 1-10 mu m, and the dry density is high, so that the device is suitable for industrial mass production.

Inventors

  • Hui Yufeng
  • LI XIAOBING

Assignees

  • 中国矿业大学

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The high-concentration micro-nano foam preparation device is characterized by comprising: a liquid storage tank (1) for containing foaming liquid; a delivery pump (3), the inlet of which is communicated with the liquid storage tank (1); The inlet of the micro-nano foam preparation unit (4) is communicated with the outlet of the conveying pump (3) and is used for mixing foaming liquid and gas to generate micro-nano foam and spraying the generated micro-nano foam back into the liquid storage tank (1); the micro-nano foam separation and recovery unit (7) is integrated at the top end of the side wall of the liquid storage tank (1) and is used for receiving and treating foam overflowed in the liquid storage tank (1); Wherein the micro-nano foam separation and recovery unit (7) comprises: a micro-nano foam collecting tank (72) communicated with the liquid storage tank (1) and used for receiving overflow foam; The foam overflow plate (73) is arranged at the bottom of the micro-nano foam collecting tank (72) and is provided with an inclined angle for guiding the flow direction of liquid; And a foam discharge liquid return pipe (74) with one end connected with the lower end of the foam overflow plate (73) and the other end communicated with the interior of the liquid storage tank (1) and used for guiding the liquid separated from the foam in the micro-nano foam collecting tank (72) back to the liquid storage tank (1).
  2. 2. The high-concentration micro-nano foam preparation device according to claim 1, wherein a first baffle plate (11) is arranged at the bottom end inside the liquid storage tank (1), the first baffle plate (11) is positioned between a liquid outlet of the liquid storage tank (1) and an injection port of the micro-nano foam preparation unit (4), and the length of the first baffle plate extends out of the injection port of the micro-nano foam preparation unit (4) so as to prevent foam from directly entering a liquid inlet of a conveying pump.
  3. 3. The high-concentration micro-nano foam preparation device according to claim 1, wherein the micro-nano foam separation and recovery unit (7) further comprises a second baffle plate (71), and the second baffle plate (71) is vertically arranged at the joint of the liquid storage tank (1) and the micro-nano foam collecting tank (72) and is used for sorting foam entering the micro-nano foam collecting tank (72).
  4. 4. The high-concentration micro-nano foam preparation device according to claim 1, wherein the foam overflow plate (73) has an inclination angle of 3-7 degrees relative to the horizontal plane, so as to guide foam removal liquid to flow back through the foam discharge liquid return pipe (74) by utilizing gravity.
  5. 5. The high-concentration micro-nano foam preparation device according to claim 1, wherein the foam discharge liquid return pipe (74) is a micro-diameter pipe, and the inner diameter of the micro-diameter pipe is 2 mm-5 mm.
  6. 6. The high-concentration micro-nano foam preparation device according to claim 1, wherein the jet opening of the micro-nano foam preparation unit (4) is arranged vertically downwards so as to jet the generated foam jet into the liquid storage tank (1).
  7. 7. The high-concentration micro-nano foam preparation device according to claim 1, wherein the capacity of the liquid storage tank (1) is 1000 mL-2000 mL, and the capacity of the micro-nano foam collecting tank (72) is not more than 300mL.
  8. 8. The high-concentration micro-nano foam preparation device according to claim 1, wherein the device adopts a modularized design, and the liquid storage tank (1), the micro-nano foam preparation unit (4) and the micro-nano foam separation and recovery unit (7) are detachably connected.
  9. 9. A method for preparing a high-concentration micro-nano foam using the high-concentration micro-nano foam preparing apparatus according to any one of claims 1 to 8, comprising the steps of: a) Injecting foaming liquid into a liquid storage tank (1); b) Starting a conveying pump (3), conveying the foaming liquid to a micro-nano foam preparation unit (4), introducing gas into the foaming liquid for mixing, and spraying micro-nano foam jet into a liquid storage tank (1); c) The micro-nano foam generated in the liquid storage tank (1) overflows upwards and enters a micro-nano foam collecting tank (72) of a micro-nano foam separation and recovery unit (7) after being separated by a second baffle plate (71); d) The micro-nano foam entering the micro-nano foam collecting tank (72) discharges liquid under the action of gravity, the separated liquid flows along the inclined foam overflow plate (73) and flows back to the liquid storage tank (1) through the foam discharge liquid return pipe (74), and meanwhile, the high-concentration micro-nano foam after liquid discharge concentration is discharged from the outlet of the micro-nano foam collecting tank (72).
  10. 10. The method according to claim 9, wherein in step b), the liquid flow rate is controlled to be 1L/min to 3L/min, and the gas flow rate is controlled to be 0.1L/min to 0.5L/min.

Description

High-concentration micro-nano foam preparation device and preparation method thereof Technical Field The invention relates to the technical field of micro-nano foam preparation, in particular to a high-concentration micro-nano foam preparation device and a preparation method thereof. Background The micro-nano foam generally refers to a micro-foam group with the diameter of 50-100 nm, has extremely large specific surface area, high stability and unique interfacial rheological property, and is widely applied to the fields of mineral flotation, sewage treatment, petroleum exploitation, daily chemical cleaning and the like. The existing micro-nano foam preparation technology mainly faces the following challenges: (1) The energy consumption in the preparation process is high, and the energy requirement is high when the conventional high-pressure jet flow or ultrasonic cavitation equipment is adopted to prepare the micro-nano foam, so that the preparation process is high. (2) The concentration and the dryness are difficult to be compatible, and when the conventional method is used for preparing the micro-size foam, a large amount of liquid phase is entrained, so that the dry density of the foam is small, and the use of the micro-nano foam is affected. (3) The foam stability is poor, small bubbles are easy to coalesce into large bubbles due to the ostwald ripening effect, so that the foam collapses and the foam size distribution is widened. In view of the foregoing, there is a need for a foam preparation apparatus that can achieve efficient foam generation, promote foam dry density, and maintain micro-nano scale dimensions. Disclosure of Invention Aiming at the technical defects, the invention aims to provide a high-concentration micro-nano foam preparation device and a preparation method thereof, which have high preparation efficiency and low operation cost, and can generate high-dry-density and high-concentration micro-nano foam through a unique internal circulation separation structure. In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a high-concentration micro-nano foam preparation device, which comprises: a liquid storage tank 1 for containing foaming liquid; a delivery pump, the inlet of which is communicated with the liquid storage tank; The inlet of the micro-nano foam preparation unit is communicated with the outlet of the delivery pump and is used for mixing foaming liquid and gas to generate micro-nano foam and spraying the generated micro-nano foam back into the liquid storage tank; the micro-nano foam separation and recovery unit is integrated at the top end of the side wall of the liquid storage tank and is used for receiving and treating foam overflowed in the liquid storage tank; Wherein, the micro-nano foam separation and recovery unit comprises: The micro-nano foam collecting tank is communicated with the liquid storage tank and is used for receiving overflow foam; the foam overflow plate is arranged at the bottom of the micro-nano foam collecting tank and has an inclined angle for guiding the flow direction of liquid; And one end of the foam discharge liquid return pipe is connected with the low end of the foam overflow plate, and the other end of the foam discharge liquid return pipe is communicated with the interior of the liquid storage tank and is used for guiding liquid separated from foam in the micro-nano foam collecting tank back to the liquid storage tank. Preferably, a first baffle plate is arranged at the bottom end inside the liquid storage tank, and the first baffle plate is positioned between a liquid outlet of the liquid storage tank and an injection port of the micro-nano foam preparation unit and used for blocking bubbles from being sucked into the delivery pump. The length of the first baffle plate extends out of the jet orifice of the micro-nano foam preparation unit so as to prevent foam from directly entering the liquid inlet of the conveying pump. Preferably, the micro-nano foam separation and recovery unit further comprises a second baffle plate with the length not less than cm, wherein the second baffle plate is vertically arranged at the joint of the liquid storage tank and the micro-nano foam collecting tank and used for sorting foam entering the micro-nano foam collecting tank. Preferably, the inclination angle of the foam overflow plate relative to the horizontal plane is 3-7 degrees, so that the foam draining liquid is guided to flow back through the foam draining liquid backflow pipe by utilizing gravity. Preferably, the foam discharge liquid return pipe is a micro-diameter pipe, and the inner diameter of the micro-diameter pipe is 2 mm-5 mm. Preferably, the jet opening of the micro-nano foam preparation unit is horizontally arranged or vertically downwards arranged so as to jet the generated foam jet into the liquid storage tank. Preferably, the capacity of the liquid storage tank is 1000 mL-2000